Updated feature #7882: Monday first day in calender
DEV: Datepicker showed Sunday as first day of week
DEV: Changed this to Monday (which is pretty much standard)
DEV: (see http://bugs.limesurvey.org/view.php?id=7882)
Merge pull request #88 from mfaber/firstday

Fixed issue #7882: Monday is now first day in calender (partial fix)