removed htmlspecialchars from function caltooltip, FIX #114
added option to show attendeelist to guest+registered, FIX #112
altered help files

- housekeeping-view did change a bit and the cleanup of images is
combined into 1 function
- category/venue-calendar don't exist anymore
alterd language-string
removed settings.js

it's not in use
added inputbox class to country field (front)

by doing so the field is more inline with the rest of the fields
editvenue: moved map checkbox to a better position
event-form (front): added class inputbox to recurrence fields

the class is added to get the fields more inline with the rest of the
fields