Beat Mailody in shape a bit more.
It's almost in a state I could actually start using it.

Remove functions that are no longer needed. Mostly related to the check mail timer, which is handled by akonadi.

Also remove the handling of offline/online, as that's no longer Mailody's bussiness either. At start and after the setup, we trigger a sync of the mailboxes, so the accounts show up in Mailody. No need anymore for akonadiconsole and friends to trigger the stuff.

Also implemented the basic statusbar, showing the status updates as received by Akonadi.

/me is happy.