Added a getter method for the Rapla

RaplaCalender of the MainActivity
Fixed the endTime of repeating events

THANKS SEBASTIAN ò.ó

(Also added 3 Getters for the duration of an event)
Added RapplaGrid to the DayLayout

currently not working
Fixed currently hardcoded maximal Eventlength

from 40 (= 10 hours)
to 60 (=15 hours)
because CCNA is too freaking long
Day & Week Fragment now inherit from CalenderFrag

They only have to overwrite the configureGrid() method
Fragments can now access the Parsed Calender

This happens through a Getter method in RapplaFragment