Optimized Vector3 constructor and Rendering terrain.

Signed-off-by: Strakas <reetopps6@hotmail.com>
Merge branch 'master' of https://github.com/Malow/NDYGFX

Conflicts:
	ModelViewer/ModelViewer.cpp
	Source/CascadedShadowMap.cpp
Fixed conflicts

Signed-off-by: Strakas <reetopps6@hotmail.com>