WSM-7 add 3 table artist,track,playlist
Merge pull request #10 from lightindark/develop

Develop
Merge pull request #14 from lightindark/WSM-8

Wsm 8
WSM-12 #comment exclude build.properties in .gitinore
WSM-13 #fix install pack_wsmusic
WSM-13 #fix install pack_wsmusic
Merge pull request #17 from tuanwebsoc/WSM-12

WSM-12 #comment exclude build.properties in .gitinore
Merge pull request #16 from tienwebsoc/WSM-5

WSM-13 #fix install pack_wsmusic
fix some bugs
WSM-14 #Make com_wsmusic installable
WSM-8 #fix tracks view and add template