VERSION 0.99.920: support for xform-coloring-types — JWildfireSwan Steam update #3725997

I now added support for xform-coloring-types from JWildfire. This was a rather challenging task because they work so different: some just modify the iterated color value (and keep the result like in default mode), while others modify the color directly without changing the color iteration, which both works differnt on normal xforms and final xforms. Some of them require a seconds render pass (like in using a texture image). In general, a very useful addition, improving the coloring options of fractals a lot. Thanks again to Rick Sidwell, who introduced them in JWildfire! Please note, that there a limitations of these coloring types on final xforms (due to the nature of the GPU render pipeline. But, this feature is the most useful on regular xforms) Complete changelog: - extended the main render pipeline for extra coling steps - added support for the NONE-coloring type (which is now the d...