Finally released it, still have to add the calendar for birhtdays (for GroupCalendar addon) but besides that everything should work smooth.

Download, example and other info in the announcement (here)

Installation is a bit like RaidTracker

- extract it to addons-folder
- edit conf.php
- click on EventCalender link to generate tables

That should be it

Btw, updating of the eventcalendar is only possible when updating char AND the char has to be in the conf.php (just a sidenote ...)