Revert to previous version

- removed broken maps from conquest
- removed zsd and zsd 85 from china conquest, and replaced with zsd90
- fixed usa spawning in late units on day 1

- fixed some bugs with new conquest update

- reworked conquest units/research

Completely went threw all conquest units and the research tree, and changed everything.

Conquest is now more of a "combined arms" experience, focusing more on "airborne/mechanized/armored" infantry units instead of "only" infantry or "only" armor. AI will now roll out with IFVs, armored cars, helis, and even MBTs with infantry attached.

The research tree is still a similar setup from before, but a bit more compressed. Single vehicle units have been combined into infantry units. Now, only support units are singled out (emplacements/AT cars/AA/Arty ect)

- added "emit on attack" to all transport helis

- reworked fuel tank hit effects
- fixed insurgents weapons

- updated track grit effects

- fixed engineers

- fixed "never-ending" cook off coming from tanks

- added "heat" signatures to all of the new chinese vehicles for thermal view
- reworked mud/snow/ground "grit" from tanks
- made "winter/cloudy" environment permanent "night vision" when in rts mode
- made "autumn/cloudy" environment permanent "night vision" when in rts mode
- reworked all abrams default "olive green" color, and made it much darker
- added visible broken tracks and main gun to all abrams models

- added "EMD Autobahn" to conquest
- added "EMD Syria V2" to conquest
- minor fixes to Northair conquest map

- sped up "walking while aiming" speed for first person mode
- removed the 3rd crewman from the Milan
- fixed Chinese crewman appearing in Russian vehicles