Changes since 1.4a

F Fixed an issue with TEXTURE2 lump loading which skipped the last entry.
F Definitively fixed the retail/registered distinction
F Fixed Ultimate Doom par times crash (finnw)
F Fixed status bar "dirtying" by help screen
F Fixed savegame name nulling
F Fixed Quicksave string issue.
F Fixed negative index objects crash
F Fixed finale text centering error
+ Added MIDI/MUS compatible sound system ( by _D_, finnw).
+ Added PC speaker sound emulation (-speakersound)
+ Added Classic sound mixer (default)
+ Added Audioline-based sound mixer (-audiolines) (by _D_, Velktron)
+ Added Clip-based sound mixer (-clipsound) (By Velktron)
+ Added missing reject table safeguard
+ Added anti tutti-frutti safeguard
+ Added safeguards against certain mapping errors
+ Added an efficient object pooling system.
+ Added Gamma level settings.
+ Added patch_t load-time safeguard vs. broken columns.
+ Added Game Sound interface for channel/position/volume management.
+ Added graceful closing of open file handles.
+ Added always run option
+ Added pop-up message box on modified games