Added skills, motd

Chat:
* Tirinde.Chat now has message of the day functionality. Added /motd
  command.
* /msg now properly uses Tirinde.Chat instead of vanilla whisper.
* Better error messages (hides admin functionality from users).

Skills:
* Finished anvil aspects of enchanting and smithing
* Added an ItemInsertedEvent in order to make a few things easier. Also
  needs a ItemExtractedEvent...
* Added profession field to database - not used yet.

Core:
* Sorted out versioning