Add save/restore of render buffers in save states
Gzip memory blocks in save states
Move front-buffer management back to pvr2
Add screenshot preview when loading save states
Various minor fixes and cleanups
src/display.c
src/display.h
src/dream.h
src/dreamcast.c
src/dreamcast.h
src/drivers/gl_common.c
src/drivers/gl_common.h
src/drivers/gl_fbo.c
src/drivers/gl_sl.c
src/drivers/video_gtk.c
...

Explicitly include stdio.h
src/x86dasm/x86dasm.h

Handle case of setting value to itself (ie don't change anything)
src/config.c

Add convenience MMIO_ADDR macro
src/mmio.h

Use the higher of 0x28 and 0x29 for volume until we figure out how it really
works
src/aica/aica.c

Ensure xlat cache is flushed on state load and reset
src/sh4/sh4.c

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