Remove unused method
Integrate Outlook calendar source

  * Login with Windows live ID
  * Import contacts with email hashes
  * Import calendars
  * Import calendar events
  * Separate background workers for Google and Outlook
Remove calendars from DB when deleted at Outlook
Find Outlook contacts in Skejul DB using email hash.
Adjust format_time_slot to support multiple parameters
Fix issue in background process for importing Outlook contacts.
Temporary system defined schedules for new event with Outlook account
Remove unused icon library