v1.10 Free building placement

[img]http://media.indiedb.com/cache/images/games/1/44/43316/thumb_620x2000/capsule.1.png[/img] [b]Feature[/b] Free building placement: Except the resource center, other base buildings can be placed freely on the map. Improved ground vehicle destroyed effect: When the ground vehicles are destroyed, this camouflage will change into rust color, and the heavy vehicles may have a chance to burn for a while before explosion. [b]New Building [/b] Firebase: The dozer can build the firebase which can garrison at most 4 infantries, and it can call the helicopter to carry a missile turret or even howitzer on it.