Audit tex_impl for GLES support
Audit tex_impl for GLES support

tomaka/glium,binsoftware/glium,acolley/glium,sdotz/glium,bvssvni/glium,nicokoch/glium,rozaliev/glium,christopheraugustus/glium,caldwell/glium,TyOverby/glium,glium/glium,cpjreynolds/glium,carbidegames/glium