Bump version in setup.py to 10.4.4

We forgot to bump the version for 10.4.3, and it's been tagged,
so we release 10.4.4 with no changes
Exit with correct status and output

Fix athdir so that it correctly exits with status 1 if no paths
were found.  Also, it should not print anything if no paths were
found (previously, it printed a blank line).