Splashscreen Class

Added splash screen class. May need to adjust rotation based on camera
for anything other than initial splash screen.
Merge branch 'billboarding----splash-screen' into Collisions

Conflicts:
	Crate/Crate.cpp (mostly resolved - splashscreen cube is not displaying at the moment)
	Crate/Crate.vcxproj (resolved)
	Crate/Crate.vcxproj.filters (resolved)
Merge branch 'Collisions' of https://github.com/ethanjohnson89/comp446-project2 into Collisions

Conflicts:
	Crate/Crate.cpp (resolved)