renamed source files for c++
renamed rgbe and plyfile back to .c
added Vector, Box and Ray constructors
added namespace
c++ fj_triangle.cc
added Mesh member functions
c++ Ray
c++ fj_box.cc
c++ Timer
c++ numeric
c++ Matrix
added std::vector to PointCloud
added PointCloud member functions
removed free functions for PointCloud
added std::vector to Curve
c++ Curve
c++ Color
c++ TexCoord
PointCloud inherits PrimitiveSet
Mesh inherits PrimitiveSet