New Traits Added:
(+) Superior: Trader
(-) Luxury Lifestile
(+) Academy Training III
(-) Black Thumb IV
(-) Black Thumb V
(+) Fearless Warriors III
(+) Fearless Warriors IV
(+) Fearless Warriors V
(-) Feable Warriors III
(-) Feable Warriors IV
(-) Feable Warriors V
(+) Brilliant Strategist IV
(+) Brilliant Strategist V
(-) Poor Strategist IV
(-) Poor Strategist V
(+) Optimal Defense III
(+) Optimal Defense IV
(+) Optimal Defense V
(+) Deadly Weapons III
(+) Deadly Weapons IV
(+) Deadly Weapons V
(+) War Heroes
(+) Glorious Heroes
Some changes in: Superior: Empire, Inferior: Empire, Superior: Ground Forces, Superior: Heroes, Brilliant Strategist III, Poor Strategist III, Academy Training I-II
Tooltips are now working.
Higher level Traits now have a minor side-effect.
The original code has a typo making Deadly Weapon I and II showing up in the list at the same time. This is because they are both stated as Level 1. As a result to avoid any possible confusion I decided to set all Deadly Weapons level to Level 1, that is why all the levels can be seen in the list.
Hero professions number reduced because of the Trait limit. They are now giving more for higher a price.

New Traits:
(+) Legendary Heroes III (-50% upkeep, +3 XP/turn and +25% XP on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +[Hero Level] Target Weight)
Engineer (+[Hero Level]*2% Ship Health and +[Hero Level]% Health Regeneration)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
Politician (+[Hero Level]*2 Influence Point per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Trader (+[Hero Level]*2 Dust per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Scientist (+[Hero Level]*2 Science per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
(+) Ground Battle Tactician I-II (-10% Troop Manpower cost on Empire; -20% Troop Manpower cost on Empire)
(+) Virtual Training I-II (+3 XP/turn on Ships; +5 XP/turn on Ships)
(-) Mortal Heroes (Heroes won't return)
(+) Extra Hero (Start with one more Hero)
Combined Traits:
(+) Superior: Ground Forces
(+) Superior: Space Ships
(+) Superior: Heroes
(+) Superior: Economics
(+) Superior: Empire
(+) Inferior: Empire
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep, +3 XP/turn and +25% XP on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +[Hero Level] Target Weight)
Engineer (+[Hero Level]*2% Ship Health and +[Hero Level]% Health Regeneration)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
Politician (+[Hero Level]*2 Influence Point per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Trader (+[Hero Level]*2 Dust per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Scientist (+[Hero Level]*2 Science per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
(+) Ground Battle Tactician I-II (-10% Troop Manpower cost on Empire; -20% Troop Manpower cost on Empire)
(+) Virtual Training I-II (+3 XP/turn on Ships; +5 XP/turn on Ships)
(-) Mortal Heroes (Heroes won't return)
(+) Extra Hero (Start with one more Hero)
Combined Traits:
(+) Superior: Ground Forces
(+) Superior: Space Ships
(+) Superior: Heroes
(+) Superior: Economics
(+) Superior: Empire
(+) Inferior: Empire
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep, +3 XP/turn and +25% XP on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +[Hero Level] Target Weight)
Engineer (+[Hero Level]*2% Ship Health and +[Hero Level]% Health Regeneration)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
Politician (+[Hero Level] Influence Point per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Trader (+[Hero Level] Dust per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Scientist (+[Hero Level] Science per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
(+) Ground Battle Tactician I-II (-10% Troop Manpower cost on Empire; -20% Troop Manpower cost on Empire)
(+) Virtual Training I-II (+3 XP/turn on Ships; +5 XP/turn on Ships)
Combined Traits:
(+) Elite Ground Forces
(+) Elite Space Ships
(+) Superior: Heroes
(+) Superior: Economics
(+) Superior: Empire
(+) Inferior: Empire
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep, +3 XP/turn and +25% XP on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +[Hero Level] Target Weight)
Engineer (+[Hero Level]*2% Ship Health and +[Hero Level]% Health Regeneration)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
Politician (+[Hero Level] Influence Point per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Trader (+[Hero Level] Dust per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Scientist (+[Hero Level] Science per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
(+) Ground Battle Tactician I-II (-10% Troop Manpower cost on Empire; -20% Troop Manpower cost on Empire)
(+) Virtual Training I-II (+3 XP/turn on Ships; +5 XP/turn on Ships)
Combined Traits:
(+) Elite Ground Forces
(+) Elite Space Ships
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep, +3 XP/turn and +25% XP on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +[Hero Level] Target Weight)
Engineer (+[Hero Level]*2% Ship Health and +[Hero Level]% Health Regeneration)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
Politician (+[Hero Level] Influence Point per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Trader (+[Hero Level] Dust per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
Scientist (+[Hero Level] Science per destroyed CP, +[Hero Level]% Accuracy, -[Hero Level] Target Weight)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
(+) Ground Battle Tactician I-II (-10% Troop Manpower cost on Empire; -20% Troop Manpower cost on Empire)
(+) Virtual Training I-II (+3 XP/turn on Ships; +5 XP/turn on Ships)
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep and +4 XP/turn on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +10% Health Regeneration after battle on Hero Ship)
Engineer (+[Hero Level]% Projectile Absorbtion and +[Hero Level]% Shield Absorbtion on Hero Ship, -5% Ship building cost on System)
Explorer (+[Hero Level]/4 Vision, +[Hero Level]/4 Movement and +1 Probe on Hero Ship)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
(+) Wonder Builder (10% faster Wonder production)
(-) Ancient Architecture (10% slower building production)
... More will come in the next update

New Traits:
(+) Legendary Heroes III (-50% upkeep and +4 XP/turn on Heroes)
(+) Academy Training I-II (+1 Skill Point on Heroes; +2 Skill Point on Heroes and -10% required to unlock the next Hero)
(+) Hero Professions (Only one can be choosen; Effects all Heroes; System effects apply when Hero is governor.)
Ace Pilot (+[Hero Level]% Critical Hit Chance, +[Hero Level]% Evasion, +10% Health Regeneration after battle on Hero Ship)
Engineer (+[Hero Level]% Projectile Absorbtion and +[Hero Level]% Shield Absorbtion on Hero Ship, -5% Ship building cost on System)
Explorer (+[Hero Level]/2 Vision, +1 Movement and +1 Probe on Hero Ship)
Politician (+5 Happiness and +[Hero Level] Influence Point on System)
Miner (+1 Deposit Value on Strategic Resources on System)
Trader (+[Hero Level]% Trading route income on System)
Noble (+[Hero Level]% Luxury Resource Value on System)
Militist (+[Hero Level]*5 Manpower and +[Hero Level]% Defending ground troops health on System)
(+) Brilliant Strategist III (+30% Infantry Minimum Damage, +30% Infantry Maximum Damage)
(-) Poor Strategist III (-30% Infantry Minimum Damage, -30% Infantry Maximum Damage)
(-) Black Thumb III (-20% System Growth)
(+) Unique Design (+5% Damage and +5% Health on ships, but -1 Fleet size)
(+) Expert Negotiator (10% Peace Treaty cost reduction)
... More will come in the next update

New Traits:
(+) Legendary Heroes III
(+) Academy Training I-II (gives an extra Skill Point)
(+) Hero Professions (Ace Pilot, Engineer, Explorer, Politician)
(+) Brilliant Strategist III
(-) Poor Strategist III
(+) Unique Design (stronger ships, but smaller fleet)
(+) Expert Negotiator (small Peace Treaty cost reduction)
... More will come in the next update

Adds more traits:
(+) Legendary Heroes III
(+) Academy Training I-II (gives an extra Skill Point)
(+) Hero Professions (Ace Pilot, Engineer, Explorer, Politician)
(+) Brilliant Strategist III
(-) Poor Strategist III
(+) Unique Design (stronger ships, but smaller fleet)
(+) Expert Negotiator (small Peace Treaty cost reduction)
... More will come in the next update
Planned:
(-) Inadept Negotiator (coming in next update)
... I will read more code to get new ideas

Here is my first attempt to open some customization possibilities for the races. I really like the heroes, but they have so little customiation options.
The hero traits effect only the heroes, even the ones you get later in the game. Also, some traits now have a third level.
I am still working on balancing and adding more traits.
Feel free to report bugs or balancing issues. :)