Build 8533
SVN-
Slightly refactor S_TryFormats
SVN handles and Git names are merged into one person.
Slightly refactor S_TryFormats
Remove chdir for artLoadFiles now that the engine has g_modDir
Fix -Wparentheses
Scan for *.dat in addition to .grp, .zip, .ssi, etc.
Move the nulling of the MIRROR tile to after defs are parsed so that tilefromtexture does not interfere with mirror function.
Adjust alphatabs checking to activate features when numalphatabs >= 15 instead of 16 so that my precise mode can be used.
Don't unpause sounds when exiting the menu back to a Game Paused state.
Restore some accidentally-working cases of SEs 5, 6, 14, and 30 broken in r3161.
Add globalgameflag 4, DUKE3D_NO_PALETTE_CHANGES. This disallows the game from performing its usual modification to palette data after loading it, mainly the transparent color.
If you use this flag, make sure your transparent color it set exactly as you would like it to be used in cases like those presented in the previous commit.
Add globalgameflag DUKE3D_NO_HARDCODED_FOGPALS, which prevents the game from automatically defining white, red, green, and blue fogpals in the first four adjacent empty palookup slots it finds.