With that, I moved R_CreateColormap2's exclusive software colormap malloc code to R_CreateColormap, and merged the two software-only blocks of code into one. I also disabled any unneeded variables and fixed a preprocessor-related goofup
* A better representation of an Encore level, now with inverted graphics (a special remapping we can now use elsewhere whenever if we want!) and a floating Ruby!
* Decouple encore's setting from cv_kartencore on mapload. Instead, bake it into D_MapChange and related, which will only some of the time be fed by cv_kartencore's value.
* Encore mode now has a special mapheader palette setting, "encorepal", rather than using the same one as non-encore.
* Palette remaps.
* Branding.
TODO:
* Doesn't work in GL. (Mostly.) I have SOME ideas on how to tackle this, but...
* Transmaps are broken in Encore for some reason.
* I tried to make in-level colormaps shimmy over, but it didn't quite work, so I commented it out and only semi-fixed it.
