Created skeleton of ContactManagerImpl. Method stubs only.
Created Driver class for the IO and running of ContactManager
Added FutureMeetingImpl which extends MeetingImpl and implements FutureMeeting
Added addNewFutureMeeting() method. Still needs IO stuff doing.
added some comments, and some imports for the IO and XML parts.
Added FileWriter to constructor.
Added comments to methods in the interest of avoiding future headaches.
Added a Calendar to class + constructor representing today's date.
Added contactList attribute. Modified addFutureMeeting to check date and contacts to ensure they are valid.
Am idiot and forgot to add ContactManagerTest to repo. testAddFutureMeeting() failing as expected, because haven't yet implemented contact list in ContactManager.