Updated version to 1.6.3

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@662 98b4c264-8670-11de-a133-9d545b4d7674
Added Growl initialisation exception check

git-svn-id: https://get-iplayer-automator.googlecode.com/svn/trunk@663 98b4c264-8670-11de-a133-9d545b4d7674