Calendar 1.6.0-rc2

Thanks to everybody who helped testing all release candidates in the past months - it has been a long time!

Since we added so many features we decided to bump the minor version of the calendar.
1.6.0 will come soon!

Here is the most likely last release candidate:

We plan to announce the final version during the ownCloud Conference 2018 this week!

Happy to meet you there the next days!