Fixture enhancements

- GLP Volkslicht: filled GUI colors for color macros. The values are RGB matches of the predefined colors (in fixture color space).
  Only Amber is a guess.

- Varytec Gigabar: filled lens angle
Merge pull request #106 from janosvitok/fixture-enhancements

GLP Volkslicht and Varytec Gigabar enhancements