Application Layout, Destination List data, etc

1. Changed application layout from 1 activity to 3 fragments. Now home
screen has three fragments - 1 Header, 2 List of Destination 3. Buttons
(yet to be implemented)
2. Moved Destination ListView from single activity to a fragment.
3. Updated the data adapter fro ListView.
4. Custom ListView item style now works on fragments.
5. Improved home screen UI by making full-screen app.

Things not done-
Removing extra margin in listview items