C&C Ancients Additional Units

Made some modifications to BroamChomsky's files to differentiate between the classes of units.

Warriors > 4-man Peltast model
Light Infantry Bow > 2-man Infantry model with bows
Medium Infantry > 6-man Infantry model
Heavy Cavalry > 4-horse Cavalry model
Light Cavalry > 2-horse Cavalry model
Light Cavalry Bow > 2-horse Cavalry model with bows