Removed older code that is no longer critical to core functionality.

 - Removed the concept of 'tags'. Minion now primarily operates on
   arbitrary words, rather than specific tags.
 - Removed the merge script - Minion now has functionality built in. See
   Collect.
 - Removed logit. See 'minion log' instead.
 - Removed graphical minion prototype, since it did not work yet. Will re-add later when closer to an
   actual implementation.
 - Removed web-based minion prototype, since it did not work yet. Will
   re-add later when closer to an actual implementation.
 - Removed post-to-wordpress feature. This is easily handled by a
   separate script, and is not core to Minion. May re-add at some
   future date when minion supports arbitrary 'publish' plugins.