ave.
We revised the Rgb class to Colors:
   1. Added support for hex (html style) representations of Colors
   2. Added support for HSV representations of Colors
   3. Added multiple initializers to create an instance from
      HSV/HEX/RGB format
   4. Added protected update functions which allow us to keep
      concurrency from RGB/HEX/HSV
   5. Added context_list_colors which returns an array of color names
      	    -Newest version of GimpBus publishes this to the interface
   6. Added color_name_to_rgb(string) which returns the value of a color
      name.