Merge pull request #1 from EngineersMadafakas/media_player

Media player added
Defined specific stop() method so the song can be played again from the start if play is pressed afterwards.
Merge remote-tracking branch 'origin/master'
Cleanup code and commented everything.
Added song selector using Intent.
Added a pop-up screen when pressing the quit button. All seems to be OK
Solved bugs when changing orientation.
Solved error when song selection was cancelled.
Started messing with the UI
Added RightActivity
Revert to 161ed70fa1858123bee1bdb3970763f6990db82f
Added RightActivity and "Right" button to open it.
Added side transition when switching activities
Swipe transitions between activities
Merge pull request #3 from EngineersMadafakas/messy-ui

Messy ui