Moved addNotes method from PastMeetingImpl into MeetingImpl so FutureMeetingImpl also inherits that method
Also moved getNotes method from PastMeetingImpl to MeetingImpl
Added junit tests for getFutureMeeting
Changed junit tests by replacing addNewPastMeeting with addFutureMeeting as had forgotten this method existed, but using this method makes more sense for getFutureMeeting tests
Added junit tests for getMeeting method. tests fail as expected
Added implementation for getMeeting. Tests now work as expected