Comment + getSong
Merge pull request #64 from amina196/master

[music] squeleton of the SongSearcher class
Comment v2 + getSong v2 + Grade (Constructor)
added "bitmusic." in User class to stop compilation error
Merge pull request #65 from Levleyth/master

[Music]Comment v2 + getSong v2 + Grade (Constructor)
Merge origin/master