4822: data privacy improvement, purge log files
added purge script for master/slave db
added more rotator pictures
and removed a duplicate, weak picture similar to the better pano #30
Merge branch 'stable'
updated and translated 'verein' page
improved feedback when changing profile details, email or password

After profile detail change, return to the details display.
After email or password is changed, show only success message.
resolved merge conflict