Add libpng as a dependency
configure
configure.in

Maintain current gdrom and recently-used list in config file
src/config.c
src/config.h
src/gui/gdrom_menu.c
src/gui/gtkui.c
src/gui/gtkui.h
src/main.c

Make the sure initial GD (if any) makes its way to the gui
src/gui/gdrom_menu.c
src/main.c

Fix CDI with multiple tracks/session
Fix file being closed too early
src/gdrom/cdi.c
src/gdrom/gdimage.c
src/gdrom/gdrom.h
src/gdrom/linux.c
src/gdrom/nrg.c

Bump the save state version number (incompatible changes)
src/dreamcast.h

Fix BIOS reloading
src/dreamcast.c
src/mem.c
src/mem.h

Fix AICA save state section to include the current audio + IO state
src/aica/aica.c
src/aica/aica.h
src/aica/audio.c
src/aica/audio.h

Initial gdrom attachment menu
src/Makefile.am
src/Makefile.in
src/config.c
src/config.h
src/gdrom/cdi.c
src/gdrom/gdimage.c
src/gdrom/gdrom.c
src/gdrom/gdrom.h
src/gdrom/linux.c
src/gdrom/nrg.c
...

Implement channel position readback
src/aica/aica.c
src/aica/aica.h
src/aica/audio.c
src/aica/audio.h

Fix long standing texcache management bug (invalidate palette was not placing
the invalidated entries on the free list).
src/pvr2/texcache.c