added vertex format, changed name of existing
lighting demo
commit
Merge branch 'master' of https://github.com/ericrrichards/dx11

Conflicts:
	DX11/BoxDemo/Program.cs
	DX11/Core/Lights.cs
	DX11/Core/Util.cs
	DX11/Core/Vertex.cs
	DX11/DX11.sln
	DX11/HillDemo/Program.cs
	DX11/ShapesDemo/Program.cs
	DX11/SkullDemo/Program.cs