* General bug fixing. * Added Italian locale from Alessandro De Zorzi * Adjust timezone handling in regression testing (Markus Warg). * Many fixes to caldav-client from Michael Rasmussen. * Update caldav-client to use direct socket IO from Andres Obrero. * Added dummy handler for POST CANCEL events for iCal compatibilty (Wolfgang Herget). * Support usernames with spaces or punctuation. * Correct errors in handling confidential events. * Improved response to GET for calendar with a single event. * Documentation corrections. * Remove the misguided hide_todo configuration option. * Fix a bug in hiding alarms. * Deprecate 'collections_always_exist' config option and restrict it's scope. * Updated French translation. * Updated relational integrity constraints. * Fix database versioning.