Added Bounding Box collision helper class.

Replaced the Gadget collision code with the helper class one.
Level finish code will now use collision box instead of collision circle.
Merge branch 'testing' of https://github.com/jappeace/hw-isgp-kbs into testing

Conflicts:
	ISGPKBS/Game/Game.vcxproj.filters
Merge branch 'testing' of https://github.com/jappeace/hw-isgp-kbs into testing