This class provides encapsulates the GLM library for to save and load ofMesh in OBJ format.
It also allows for Normal generation
GLM library by Nate Robins, 1997 ndr@pobox.com, http://www.pobox.com/~ndr/
Addon by Satoru Higa ( http://structor.jp/ ) Improvements by James George ( http://jamesgeorge.org/ )
Example sphere from: http://liszt.stanford.edu/meshes/sphere.obj