Bi-directional list that simulates CD-ROM audio functionality. Kinda mimicking the way list of Music behaves ,where you can switch between a song and another using two arrows ">" "<"

Current functionalities: *Insert Song description in each of list cells *Display the whole list *Add all the songs from a list to another(decroissant) depending on the duration *delete a song *Add a song from the header of the list(expoloiting the two nodes size prec and suiv)