added type field to appointment
added semesterId alternative field
extended SemesterService: Date utility, get start- and enddate of specific semester
update .gitignore, removed .project and .settings
implemented extended SemesterService
--amend
moved type attribute from appointment to series
added type support for seriess
fixed incomplete form misbehaviour
outsourced static date formatters
json serialization of dates fixed
outsourced DateFormat
roomOccupancy date representation fixed
extended web interface with additional json interfaces
FacultyService: reverted sorting behaviour of getList()
Series: added mapping from enum to string
view-appointment: removed semester field from appointment
Util:Tuple: add Map to List method
Controller: additional getSeriesOptions for semester