updated jquery timepicker, changed to "range" mode ( start time max limits end time min, end time min limits start time max)
changed "create" behaviour (bug:1435257 ) - now call attemp is created only if appointment is submitted
*?? do we need to "delete" call attempt id apointment is deleted? ( filter by called / not yet called cases?)
* required to develop date/time restriction according to shifts and timeslots , call addshift.php if shift is not sheduled for required date/time
