Textures in progress
Texture work
removed render window
Textures working on gl2.0
texture rendering gl 4.0
Texture work
Merge branch 'textures' of https://github.com/mweschler/SPEng into textures
Fixed rendering on some modern OpenGL systems by adding compatibility context.
Merge branch 'master' of https://github.com/mweschler/SPEng
Removed visual test