Fixed bug where upgrades were broken for non GS users

Minor text fixes

Updated Italian text thanks to d_iperione
Fixed Chinese languge bug that was breaking upgrades when using Chinese languages thanks to Flactine
Changed the way Units_XP2 is applied
Move Greek Peltast and Zulu Isijula to Iron Working
Changed Sweedish Hakkapelitta to upgrade to Armoured Infantry instead

- Added complete rework of the Courser unit
- Added Spitfire fighter for historical user civs
- Fixed Japan's Zero animations
- New Carrack unit replaced the Galleon and moved to Education
- A few upgrades to the art for the Javelineer

- fix Naval Bombard getting +17 vs naval units

- fix Venetian Arsenal bug on Naval Bombard units
- add Naval Bombard units to Maritime Industries, Press Gangs, & Int Waters
- fix for Naval Bombard units receiving +17 on defense vs land ranged units
- better descriptions for certain promotions (Naval Bombard, Air Ground-Attack, Air Fighter, Air Bomber)

- fixed Canada hat bug affecting the field gun and mounted rifles

- Completed CV work for Ancient and Classical Era
- New Psiloi, Battering Ram, Catapult, Siege Tower
- Ancient units use pre cololian CV looks for Australia, Canada, US, Brazil
- New logo made by zipprian
- fixed bugs: oil prereq for Modern Marine, proper upgrade paths for Bireme and Khmer UU from ST:UU
- We made a Twitter account to update you on progress, please follow us.

- New icons for most units; made by Zipprian
- Changed WW1 machine gun: two models - Maxime and Vickers
- Changed and diversified: Spearman, Chariot Archer, Heavy Chariot, Heavy Infantry, Swordsman
- Added Centurion to Roman Legion
- Small bugfixes and adjustments to previous units

- Credit goes to: Hizkiyahu, KrumStrashni, Zipprian (icons and helmets and shield models), Sukritact (for Celtic armor and some of the shields), Siau2tie1

-Reworked Composite Bowmen to vary depending on culture.
-Other small fixes