Removal of more cruft
-Standardize use of glDrawRangeElements
-Standardize on use of ARB_texture_env_combine
-Standardize on ARB_texture_non_power_of_two
-Remove dead code related to EXT_texture_env_combine
-Remove unnecessary code related to ARB_shader_objects
Merge in minor tweaks from upstream

-OS_PATH is now 256
-Bloom effect now has new defaults