IWAD optimizer

[viti95]

The idea is to modify WADptr for FastDoom, which includes these ideas:

• [x] Remove palettes 1 and 9 from PLAYPAL, they are not used. Also smaller LUT for non-VGA backbuffered modes. 1'5Kb size less (!)
• [x] Remove multiplayer lumps
• [x] Fix sidedef merging, do not merge type 48 linedef associated sidedefs
• [ ] Reduce patch height size from 2 bytes to 1 byte (!)
• [x] Optimize full screen (320x200) graphic lumps (!)
• [ ] Reduce linedef backside size. It should fit in 1 bit (!)
• [ ] Use pointers for sidedefs textures (!)
• [ ] Use pointers for sector textures (!)
• [x] Remove colormap 33 from COLORMAP, it's not used. 256 bytes less. (!)
• [x] Remove unused sounds (!)
• [ ] Remove unused PNAMES, update TEXTUREx
• [x] Merge STBAR and STARMS (!)

(!) Requires FastDoom source code modification