Art: New civ icon + alpha
Art: Further tweaked new leaderscene added in previous update
Art: Completely new map (by Jake - thx laddo)
Art: Made small adjustments to the UU and UB icons
UB: Significantly more expensive and newly trained Units receive Combat Strength number of nearby hills. Also still has the old effect with one time Experience bonus.
General: Optimized code
Modsupport: Disabled events and decisions

- Disabled print statements.
- Reduced the size of the alpha icon.
- Added a new leaderscene. The old one is still included in the civ and can easily be used instead by simply switching the names of the files "Burebista_Scene_old.dds" and "Burebista_Scene.dds" located in Art/Diplomacy. The reason for the new leaderscene is that while I attempted to make it for civ VI, I couldn't really match that style, and then instead of discarding it, I thought it appropirate to include it here. This also bc the new leaderscene isn't just a quick edit of some existent art found online, but rather heavily edited parts from multiple sources pasted together, making it feel more like "my" creation than the old one.

- optimised code
- updated mod support
- slightly decreased amount of production granted through the UA for further balance
- fixed a bunch of typos

- added peace and war themes

- UA: changed the amount of Production received from promoting units. The amount is now based on the era you're in and will in all eras vary between 10 and 20 Hammers per promotion.