Working on Controller

Added controller, anonymous action listeners for buttons, JTree with
FileTreeModel for SelectScreen and main class - FileSieve.java. Also
included Mockito in lib.
Copy Screen stubbing

Stub for copy screen, copyJobListener
Connected all BusinessLogic methods to GUI

All screens are now complete and perform real methods from
BusinessLogic packages.
Merge pull request #10 from JeffBlodgett/GUI-and-controller

Working on Controller