Added NURBS_Surface class, with some definitions.
Renamed NURBS_Surface to NURBSSEV (NURBS Surface Encapsulated Volume)
Added Intersection check (&&)
Added planned functions for TerrainGenerator and Simplexnoise
Added PhysObject class, minor modifications in Simplexnoise
Added code for 4D simplex noise
Added gradients and simplex corners for 4d noise
Changed simplexnoise interface, added methods for changing frquency and octaves
Added constructor definitions for NURBSSEV, added NURBSSEV.cpp to makefile, added PointVector class (used for points and vectors)
Merge branch 'terrainimprove' into development
Merge branch 'nurbsimplement' into development
Merge branch 'development' into terrainimprove