Log Message:
Upgrade of emulators/atari800 to 1.2.5

Summary of changes since 1.2.4 (from ChangeLog):

* DOC/cart.txt: fixed a few typos
* ui.c:
  - applied patch from Ed Cogburn that fixes subsequent mounting
    of R/W disks in slot that was mounted R/O previously.
  - finally implemented the R/W <-> R/O mode switching using the Space Bar.
    Please note that this R/W <-> R/O switch is just temporary and does
    not change the writeprotect flag of ATR images. Besides, it cannot
    override this flag so you actually can't mount a writeprotected ATR
    image read/write using this Space Bar toggle.
* atari.c: Ken Ames sent me a very simple patch that is supposed to allow
    compiling the Atari800 on OS/2 "using Hob X11, XFree86, or IBM's X11
    server".
* cartridge.[ch], ui.c, DOC/cart.txt: five new cartridge types (Nir Dary)
* cartridge.[ch], ui.c, DOC/cart.txt, DOC/README: seven new cartridge types
* pokeysnd.c: a fix for better quality of sound
* antic.c: ANTIC mode E + GTIA mode 9 ("Unconventional 2k", "Ass \ 
Kisiel")
* DOC/BUGS: "Numen" soundtrack
* cartridge.[ch], ui.c, DOC/cart.txt: 1 MB XEGS cart
* input.c: Amiga/ST mouse right button ("Bombdown")
* input.h, input.c, pia.c: MultiJoy4 interface (4 joysticks for XL/XE)