Log message:
Remove PYBINMODULE. All it did was mark some packages as not available
on some platforms that lacked shared library support in the past. The
list hasn't been maintained at all and the gain is very limited, so just
get rid of it.

Log message:
Update PYTHON_VERSIONS_COMPATIBLE
- assume that Python 2.4 and 2.5 are compatible and allow checking for
fallout.
- remove PYTHON_VERSIONS_COMPATIBLE that are obsoleted by the 2.3+
default. Modify the others to deal with the removals.

Log message:
Reimport biology/pymol as py-mol, and change its PKGNAME to follow the
python-in-pkgsrc standards.

Add conflict with old pkgname.

Keep PKGREVISION even though the package has a new name to confuse the
users less.