function isWebGL1(gl) {
    var version = getVersionAsNumber(gl);
    return version <= 1.0 && version > 0.0;  // because as of 2016/5 Edge returns 0.96
  }
Check if context is WebGL 1.0
@param {WebGLRenderingContext} gl A WebGLRenderingContext
@return {bool} true if it's WebGL 1.0
@memberOf module:twgl