List of things we should do when (if) we have time:

1) VTODO handling

2) Import (Export ?) data from external calendar sources
    Read valid ical files and add VEVENTS into xfcalendar format.

3) Timezone handling
    This is actually needed only if we want to syncronize several 
    xfcalendar files and search for example common free time for 
    meetings.
    But some of the code is in fact using old ical calls due to missing
    timezone data, which is native to the new version of ical.
*** DONE ***

4) Exchange data between different xfcalendar users
    To build group meetings.

5) History files
    Keep expired events in history file and remove them from the main
    xfcalendar file. This would also make the active file smaller and
    faster.
    We need some kind of cleaning function anyway ? so this would be handy
    feature to do both.
*** DONE ***

6) WEB interface to show xfcalendar appointments on the internet

7) Add pull-down menus in event-list window and appointment window
    These are not dialog windows, they should have a menu each.
*** DONE ***

8) Write help
*** DONE ***

9) fix archive file (main calendar window) option.
    Make the archive file the same than history file (and do not allow 
    selection the name for it ie. remove the selection from the parameter 
    window). And change this option to open the archive file (without file 
    selection dialog). Also switch to read-only mode so that it is not 
    possible to modify the archive (=history file)