calendarserver_export can now use -d <dirname> to export to a directory, with a .ics per calendar.  calendarserver_import -d <dirname> will read in all the files from that directory.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14148 e27351fd-9f3e-4f54-a53b-843176b1656c