Merge branch 'foomodule-poll-scheduler' of github:rku/xmpp-crowd
Allow withdrawal of votes

* This allows for withdrawal of votes with a '!vote 0' command.
Merge branch 'foomodule-vote' of github:rku/xmpp-crowd
PEP8ify some function calls and defs
Flatten some try-except blocks
Use set_defaults instead of dict for subcommand handlers