add tests for glsl versions
add tests for glsl versions

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