needs a new database field with manual init, see db-changes.txt !
and fixed another recommendation bug:
- recommendations will not get lost when a user edits one of multiple logs
for the same cache
- recommendation will not be lost if the cache is logged a second time
- RT406: recommendation will not be lost if other log of same user is deleted
* recommendation stars will only be displayed with found and attended logs
- recommendations cannot be logged with event notes
- multiple found logs of one user will be counted as 1 at top ratings list
* reversed event log type order: will attend / attended / note
