Also catch TypeError when initializing plugins
Don't title-case exceptions
Finish implementation of config.init_user()

Checks if ~/.rapport, all subdirectories and ~/.rapport/rapport.conf
are present and creates them if not.
Invoke config.init_user and catch exceptions for failed plugin runs
Whitespace fix in gerrit text template
Add datetime_from_iso8601 function to convert ISO 8601 dates to datetime
Finish Trello plugin