Added Entity.IsColliding(Collision)

Added GadgetJumpPlatform.
Added spritestrip for jump platform
Removed a warning in Entity::IsColliding

Added Size to JumpPlatform
Merge remote-tracking branch 'origin/gadget_11' into testing

Conflicts:
	ISGPKBS/Game/Game.vcxproj
	ISGPKBS/Game/Game.vcxproj.filters