UI Changes and menu options added

Changes made in this version:

-> Icon changed to seeable and readable one
-> Theme changed to black
-> Added context menu -> longpress on any item in list (not working
now... Coming soon)
-> Home back button from any activity to home activity (found near the
icon of the app on title bar)
-> menu options
-> about me
-> Search (menu option added. not working as yet. coming soon)