Add an "instancing" model renderer to improve rendering of
non-transparent,
unanimated models. This renderer is used when the vertexshader path is
rendering path is used.
This was SVN commit r3052.
Add Ogl_Shader and Ogl_Program handle types for shaders/programs loaded
from
files.
In the vertexshader render path, use a vertex program for lighting for
optimization.
This was SVN commit r2853.
