code: function fromHSL(h, s, l, a) {
      var color = create();
      setHSL(color, h, s, l, a);
      return color;
  }
docs: Creates new color from hue, saturation, lightness and alpha
  @param  {Number} h - hue (0..1)
  @param  {Number} s - saturation (0..1)
  @param  {Number} l - lightness (0..1)
  @param  {Number} [a=1] - alpha (0..1)
  @return {Array} - RGBA color array [r,g,b,a] (0..1)