Single object rendering on screen!
- Fixed Vec3Cross product
- Added MatrixPerspectiveFovLH
- Added MatrixLookAtLH
- Added primitive rendering effect with no support anything except
  wireframe
- Generated a box (needs to be improved)
Did a bit of cleanup surrounding primitive effect.
Fixed various compiler warnings. Suppressed warning C4201 to permit
anonymous structs to be used.
Attempting to fix up SumEngine memory allocation.
- Switching over to use SumEngine data structures
- Investigating allocation issues when combined with STL
- Fixing gitignore to add .unsuccessfulbuild files