https://forums.bitfire.at/topic/1015/davdroid-1-0-has-been-released/10
* new Material UI which allows you to
edit your accounts inside the app
* in-app collection management
(create/delete collections on the server)
* limit synchronized events in the past
(default: ignore events older than 90 days)
* vastly improved resource
detection
* refresh address books, calendars, task
lists after setup
* completely renewed logging
subsystem
* new settings and other
improvements
* Android 6 permissions