Add `get_uniform` function for Program
Add `get_uniform` function for Program

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