Better error if Python version is too old.
treefc10e2ab89d64089068755293e48d913996c5bea
-rwxr-xr-x 472 0publish-gui
-rw-r--r-- 113649 0publish-gui.glade
-rw-r--r-- 848 0publish-gui.xml
-rw-r--r-- 4984 archive.py
-rw-r--r-- 5791 implementation.py
-rw-r--r-- 14322 main.py
-rw-r--r-- 4252 requires.py
-rw-r--r-- 5217 signing.py
drwxr-xr-x - tests
-rw-r--r-- 4000 xmltools.py