Added NURBS_Surface class, with some definitions.
Merge branch 'development' into terrainimprove
Renamed NURBS_Surface to NURBSSEV (NURBS Surface Encapsulated Volume)
Added Intersection check (&&)
Added constructor definitions for NURBSSEV, added NURBSSEV.cpp to makefile, added PointVector class (used for points and vectors)
Added function that (somewhat) evenly distributes points on a sphere
Merge branch 'terrainimprove' into development
Merge branch 'nurbsimplement' into development