misc changes to SongSearcher
created the MusicController class
changed the implementation of ApiMusicImpl to implement Singleton Pattern
finished the implementation of MusicController
commented the MusicController class
vue de barre de recherche
Merge origin/master
Merge https://github.com/LO23/BitMusic
changed method SongSearcher.searchSongsbyUser with call to the network ApiMusic
finalised implementation of SongSearcher, need to check some methods
added javadoc comment to instance variable
make SongSearcher instance variable private
Merge pull request #150 from amina196/master

[music] finalised implementation ApiMusic with Singleton Pattern, and implementation of SongSearcher
SongLoader -> Use of ApiProfil to generate songid with userid
Rename of WrongFormatMP3Exception to CopyMP3Exception
serialised Song, Rights, SongLibrary
Merge pull request #149 from duboihug/master

[NETWORK]Ajout et modification des fonctions treatment des messages
Merge pull request #151 from jibzou/master

[Music] SongLoader & CopyMP3Exception
Merge pull request #152 from amina196/master

[music] implemented the Serializable interface for Song, SongLibrary, and Rights
[Music]
SongRater & SongCommenter
-> apiProfile

Grade & Comment
-> Serialization
[MUSIC] delete wrongFormatMP3Exception