v2.2.3: 14.06.2018
 - Fixed JS error, thanks to hartois
 - Fixed manifest.xml structure (validation now succeeds)

calendarimporter 2.2.2:
 - updated documentation

calendarimporter 2.2.1:
 - finally supporting Kopano Webapp 3.1.x
 - translation to german added

calendarimporter 2.2.0:
 - support for Kopano Webapp 3.1.1
 - Code rework
 - Calendar export improved
 - Calendar import improved
 - GUI improvements

calendarimporter 2.1.0:
 - ics sync is now implemented

calendarimporter 2.0.5:
 - added settings widget
 - compatible with webapp 1.5 and 1.6
 
calendarimporter 2.0.4:
 - added compatible with webapp 1.4
 - added gui for sync - sync algorithms not jet implemented
 
calendarimporter 2.0.3:
 - fixed all day events

calendarimporter 2.0.2:
 - fixed crash when public store does not exist
 - check if temporary directory is writeable
 - disabled display_error with ini_set
 - fixed exporter: now really exporting the chosen calendar
 - improved parser (timezone detection)

calendarimporter 2.0.1:
 - removed debug line "utc = true;"
 - Fixed problems with colons in value fields (improved regex)
 - minor fixes/improvements
 
calendarimporter 2.0:
 - updated iCalcreator to 2.16.12
 - fixed exporter problem: now you can export more than 50 events
 - fixed button visibility for attachment importing
 - minor fixes/improvements
 
calendarimporter 2.0b:
 - Completely rewritten timezone management
 - Import of iCal attachments possible
 - webapp 1.3 about page added
 - bugfixes

calendarimporter 1.2:
 - New timezone management
 - more imported fields (Busystatus, importance, label, class, organizer, reminder)
 - smaller improvements
 - deploy/build script
 - support for shared/public folders

calendarimporter 1.1 final:
 - ics exporter
 - improved ics fileparser
 - fixed ExtJS Problem in chrome

KNOWN PROBLEMS:
 - attachments in events are ignored
 - recurrent events are not handled properly (im/export)