Added -p for preserve-ingest-paths (ViPR 1.1) and -V for printing module versions, bumped version to 0.5
- changed default duration to 12 hours
- umount now waits for mode transition
- added a -v option for dumping tracebacks on error
Fixed PEP warnings and two method calls with mismatched arguments (bug)
Bumped version to 0.5.1