Add some more responses, sleep before replying.
Added twitter user preference module

- Ability to update twitter handle for a nickname
- Ability to retrieve a twitter handle for a nickname
Updated tweet links to use stored twitter handle in user preferences.
Formatted file to better meet pep8 style guide
Fixed precedence for nickname prefix assignment
Merge branch 'master' into will_master
Only use the carot if the pulling the user's IRC nick.
More helpful help.