Add wrappers for the standard math library

Simplifies transition to software based math libraries
for projects requiring determinism.

Conflicts:
	DetourCrowd/Source/DetourCollisionAvoidance.cpp
	DetourCrowd/Source/DetourCrowd.cpp
	DetourCrowd/Source/DetourProximityGrid.cpp
	RecastDemo/Build/VC9/Recast.vcproj
Fixed google code Issue 237

- check query status of moveAlongSurface() in path corridor

Conflicts:
	DetourCrowd/Include/DetourPathCorridor.h
	DetourCrowd/Source/DetourPathCorridor.cpp