PlayBarComponent: Icons added
PlayBarComponent: Added variables to differentiate play, pause and stop but Still haven't corrected the play/pause problem
PlayBarComponent: play bar slider view added , to show the time but not linked with the playing song
PlayBarComponent: play bar slider ChangeListener To Implement
Merge pull request #280 from akdiallo/IHM_update_abdoul

[IHM]: PlayBarComponent update (suite)