Merge pull request #8 from nobitis/develop

Develop
WSM-5 #comment create file wsmusic.xml
WSM-5 #comment create file wsmusic.xml
Merge pull request #9 from tienwebsoc/WSM-5

WSM-5 #comment create file wsmusic.xml
create 2 empty file wsmusic.php and wsmusic.xml
add helper_wsmusic & wsmusic.php in backend
test
Merge remote-tracking branch 'upstream/develop' into develop
WSM-7 add 3 table artist,track,playlist