Version 1.2.1

Restore compatibility with FreeBSD and DUMB 0.9.3.

Version 1.2

Fix building with recent allegro and improve desktop integration.

1.2 development edition

Work around a crash in data file loading

When using datafile abstraction of aldumb 2, allegro 4 does a double
free and crashes (see https://github.com/kode54/dumb/issues/78).