Servers with open_basedir will likely fail on /etc accesses

This is no problem, but it creates an error message even for
file_exists(). Silence it.
(CDB) Fix some small tooltip bugs
Merge pull request #11 from pgeorgi/etc-fix

Servers with open_basedir will likely fail on /etc accesses
(Core) GetScript now accept parameters in url
Fix some bugs through changes in jQuery 10.2
Change remember login time from 7 to 6 days
(CDB) Group statistics is now viewable for ordinary group leaders
Mention changes in the CHANGELOG.txt
Optimize dialogs for iOS
(CS) Optimizations for iPad
(CW) Bugfix problem when saving empty wiki pages
(CDB) Groupleaders now only see "delete tasks" if they are allowed to delete people from the group
(CDB) Bugfix group filter only when selecting groupmembertype
Optimize performance of home page
(CDB) Fix problem with PHP<5.3
(CS) Add total time to template agendas
Fix some JS-Compile errors
Change version to 2.44
Fix error in CSS for active menu items
(CDB) Add isMember filter