* Calc fadedist in R_CreateLightTable

* Store raw values per rgba in extracolormap_t (no maskcolor or fadecolor)
* Crunched some UINT16/32 into UINT8
* Calculate mask values in R_CreateLightTable
* ifdef out EXTRACOLORMAPLUMPS

* Split R_CreateColormap to R_CreateLightTable
* Replace extra_colormaps array with next/prev pointer chain
* Remove foundcolormaps; instead store lumpnum in extracolormap_t
* Add properties to extracolormap_t for portability

R_CreateColormap2 and R_MakeColormaps have been made obsolete, it's just R_CreateColormap now, like it used to be!

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

Flicky Thing Types

See merge request STJr/SRB2Internal!154

* Put default radius back in FLICKY_CENTER states

* Flickies can be in-place with just one flag (MF_GRENADEBOUNCE)
* Flickies can now hop whether orbiting, aimless, or in-place
* Removed ability to customize movedir for orbit; will always be random
* Removed ability to customize gravity sink for aimless flying flickies
* Misc: Use P_SetTarget to set actor->tracer for flicky center

# Conflicts:
#	src/r_main.c

Addfile command verify fix.

See merge request !272

NiGHTS Linedef Executor Triggers

Closes #102

See merge request STJr/SRB2Internal!142

Fix for HOM removal in non-green resolutions

See merge request !273