Added the ray implementation.

Defined an axially aligned voxel to help with intersection calculations.
Fixed a compiler warning in Plane(Not all paths returned a value).
Fixed a compiler error in Intersection where I wasn't passing the intersected object to the _intersectedObject.
Merge branch 'master' of https://github.com/codyjackson/voxel_engine

Conflicts:
	voxel_engine.vcxproj
	voxel_engine.vcxproj.filters