Improvements done on UI and usability front

1. Added a new button to launch the language and input settings.
2. Changed the UI on the tabs to be more elegant.
Converted deprecated tabactivity to fragments

As part of the UI fixes, converted the tabactivity which is deprecated
as of android 3 to fragments for future compatibility.
Merge pull request #2 from tuxrajesh/master

Added Buttons for Language Setting and fixed UI