Add Team-Calendar

[Lakritzator]

This is just to document that there is currently no way to get events from Team-Calendars.

Unfortunately, Atlassian doesn't have documentation on their API and as far as I can see there are only discussions on this missing and not working.

See here: https://jira.atlassian.com/browse/TEAMCAL-269

The only way this might be possible, is to interpret the ics file generated by:

1. Getting the subcalendar id, somehow
2. Calling /rest/calendar-services/1.0/calendar/export/subcalendar/.ics?os_authType=basic
3. use something like https://github.com/UHCalendarTeam/ICalendar/

[Lakritzator]

This returns some information:
/rest/calendar-services/1.0/calendar/subcalendars (.json)
But only gives me one calendar... which I created.

It should be possible to get events from a calendar, but this doesn't work for me..

Example:
/rest/calendar-services/1.0/calendar/events.json?subCalendarId=<id>&userTimeZoneId=Europe%252FBerlin&start=2015-10-09T01%253A00%253A00Z&end=2016-06-17T00%253A00%253A00Z
But this just returns an empty array...