Removed an unnecessary message.
Switched to using parsedatetime for --purge-time to be cleaner, more flexible, and consistent with regenerate.
Merge branch 'master' of /srv/GITROOT/Tardis
Updated the way automatic names are calculated.  Make it the default, unless you specify something else.
Improve some logging messages.
Removed the date check on args.purge.  No longer necessary.
Commenting some things.
Some minor code cleanup.
Updated version number.