calender contructor changed in Meeting and ContactManagerImpl set up
meeting contructor parameters moved to match ContactManager class
testing framework for ContactManager and basic implementation setup
tests for addFutureMeeting added
realised that MakeId needs a set method for loading 'next id' to allocate from file
added ability to reinitialise static int var Id generator after each test
added ArrayList for meetings and test
working on PastMeeting interface