Mac: update Info.plist file with extra stuff

* Not sure if this makes any difference!
Windows Launcher: Improve launching files from Desktop

* Add lines to Archi.ini as key ingredient:
  --launcher.defaultAction
  openFile
* See http://help.eclipse.org/kepler/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Fguide%2Fproduct_open_file.htm
* Use SWT.OpenDocument event
* Now launching a *.archimate file from Windows Desktop does not open new shell and splash screen