DRY up test preparation (reset and storage init)
Fix Bumbleworks.reset! (and BW::Ruote.reset!)

These didn't work before, for two reasons - one, the storage wasn't
being cleared if the .storage method hadn't already been called
(thereby initializing the @storage var), and two, the configuration was
being reset *before* calling Ruote.reset!.  This made it so the storage
wasn't actually purged when called from rake tasks, etc.
Bump version to 0.0.74