2nd alarm type & symbol for angel shifts

[katrinleinweber]

Hello and thank you for releasing this app so timely :-) I encountered the use case of needing to differentiate between talks I would like to attend regularly, and those I signed up to angel for. How about adding an "angel" option that marks the event with the glyphicon, a default alarm with T-15 min or so and another alarm tone?

[joker234]

I have a simmilar feature request in addition to yours. It should be possible to auto-Import angel shifts (maybe from the ics-Link, the angel system gives me) or to block several times manually I cannot go to talks.