-Changed all the activities to use a new theme.
  All activities now inherit from BaseActivity which changes the titlebar and sets up the buttons on the bottom.
  The buttons aren't quite finished but they are functional.
-Changed the facebook link.
  The facebook link will now attempt to use the facebook app if its present on the users phone. This can be extended
  twitter when I work out how.
-Added a hierarchy to the activities.
  Each activity now knows its 'parent' (at the minute this is just the splash screen) which can be reached from the
  back button in the titlebar
-Fixed a potential bug in the RssReader caused by newer versions of android