Minor bug fixes and optimizations

ADDED : Heavy Machine Gunners
FIXED : AV-8B was unable to fire countermeasures (and broke the CUP one as well)

FIXED : Wrong include file caused crash when using the Expansion - sorry!

ADDED : '80s US Marines
ADDED : LVTP7 Assault Amphibious Vehicle
ADDED : M65 uniforms
CHNGD : Lots of texture upgrades and improvements

ADDED : AA Specialist (Redeye) and AT Specialist (M47) along with their assistants

ADDED : New equipment from S&S
ADDED : US Navy F-4J
CHNGD : Continued US Gear overhaul from S&S

ADDED : More air, land and sea vehicles for the Marines
CHNGD : Uniform and vest upgrades

Fixed editor groups