Update bot.py

This causes the bot to ignore multiple spaces.
Update newcomer list when a newcomer changes name before being greeted
Merge pull request #36 from mhwalsh/master

Causes the bot to ignore multiple spaces
Merge pull request #37 from aaparella/fast-name-change-fix

Fix for issue #12 : Update upon name change prior to being greeted
Fix conditional error in message_response

Actor needs to be placed in a list in order to match known_nicks, which is a list of lists.  Without that, the conditional was never matching people who joined the channel to known_nicks, which meant everyone was getting greeted.  Having known_nicks be a list of lists is kind of ugly, and would be nice to change, but for now this is a solid fix (hopefully)
Made nick_clean function to handle all nick de-decorating
Reset to defaults
Add more hack to deal with list of string format}
Check if actor is empty before cleaning nicks