Update to 1.0.20:

1.0.20:
Changes: ocp.ini did not include support for .YM files as expected.
Two other minor tweaks were done.

1.0.19:
Changes: Multiple crash bugs were fixed. Support for YM files via
STYMulator was added. 24-bit SDL/X11 output should now work (which
is needed if ran inside QEMU). PTM and Adplug files should now load
and play correctly on big-endian systems. Several other minor tweaks
were made.

(wiz)