Changed shade to a const function. Implemented reflections in phong shader.  Shader class hold reflectivity parameter.  scene holds maximum number of bounces
removed test images
Removed view ray from differential geometry.  Added view as parameter to shade
Sample parameters can now be set through command line
Added turntable
Modified shaders to do proper reflections.  Repositioned spheres to avoid overlapping
Added turntable python script
Cleaned up old commented code
First pass of triangle mesh
obj loader working mostly.  Issues with normals on certain faces
initial version of OBJLoader
obj loader updated.  Triangle intersection buggy
Fixed bug in bounding box calculation for triangles.  Basic OBJLoader working
fixed bug in degenerate case, fixing normals
Added sample obj files