#4 Alter user login storage system

[Duely]

Storing logins in user-config.py--while needed for pywikipedia to work properly--is a clumsy method. We should instead store names locally and flush them to user-config.py when required. This will allow for multiple usernames to be stored for the same project, and giving users the ability to switch between them.

At the very least, in the short term, a notice needs to be made if usernames.has_key(proj); usernames[proj].has_key(lang): "Are you sure you wish to overwrite %s:%s:%s"?