Few improvements/ new functionalities:

A debug functionality has been added for developers as operator the "!wuwu debug":
    -> it writes into the script path a file named ".debug" who contain the locals, globals and bot class values.

A new command has also been added "!wuwu version" it sent a notice with its version and url.

The KeyboardInterrupt exception has been updated:
    -> it sent disconnect() before be shutdown
    -> it return false instead of true

The owner variable has been removed and the "!wuwu quit" command need to be operator instead of the bot's owner.