removed status filter from tasklist for timetracking-filter
adapted getProjectTrack in class.timetracker.php to accept an array of
task ids
changed task filtering for timefilter in a way, that all task are listes
changed the selection box in the timetracker filter to allow multiple
values
adapted stylesheet for the selection box
small simplification of code
removed print_r call
Merge branch 'devel' into timetrack-task-selection
Merge pull request #22 from SRSoftware/timetrack-task-selection

Merged for 1.2. Needs testing and a bit of refactoring.