Adding support for calendar subscriptions.
Plugins, nodes, backends.
Working in iCal. Needs unittests.
Added ACL
Test for the plugin.
More unittests.
Small fixes.
More unittests.
Few smallish fixes.
Fixed a few problems in the unittests. CalDAV is back to 100% coverage.
Merge branch 'master' into subscriptions
Lots of suggestions from @staabm
Fixed unittest to not rely on the system clock and being speedy.
Forcing another travis build
Merge pull request #326 from evert/subscriptions

Subscription-management support in the CalDAV plugin