re-added source folders for PyDev
Refactorings, thread safety improvements

- Extracted PyQt4 from lunch_server into LunchServerController
- Renamed gui_general to gui_controller, lunchinator class to LunchinatorGuiController
- Table models are thread safe, except for last_seen column
- Moved code from gui_tray to gui_controller
- Most initialization code is done before the lunch_server is started (GUI should start up faster now)
Merge branch 'qtgui' of github.com:hannesrauhe/lunchinator into qtgui
plugins are deactivated on main thread, application quits cleanly