Modification of the fixed inaccuracy vs troops of the Hussar Rifle from 14 to 20 to make it less efficient in anti-air

Modified the Hussar Rifle and the Deck Ballista.

Hussar Rifle:
- Lowered clip to 4 from 6. The Hussar rifle will still hold 6 rounds when using the "Lightweight Ammo" research choice.
- Made Hussars a research requirement.

Deck Ballista:
- Added a top restriction.
- Reduced weight to 45 from 50 and lowered HP to 128 from 160.

Added the missing modules to the game thanks to New Age of Power.

- The Gatling Sponson is a gatling gun that takes three spaces, weighs a bit more and has a worse firing angle, but is able to be placed anywhere.
- The Deck Ballista is a variant of the Ballista which has no placement restrictions.
- The Deck Rifle is simply a variant of the rifle, on a deck.
- The Hussar Rifle is the weapon the hussar use, mounted on a ship. 55 cost, 25 damage at base, upgraded to 28 with armor piercing ammo. It is unlocked when you unlock Hussars.

- Fixed a bug with the implementation of the Imperial Rock. It couldn't be placed in "combat mode".

Release of Round 1!