Artist info: include lastFmUrl and musicBrainzId


git-svn-id: svn://svn.code.sf.net/p/subsonic/code@4123 104adb81-38d2-4886-885e-82898e39ce25
Site: Added CarSub

git-svn-id: svn://svn.code.sf.net/p/subsonic/code@4124 104adb81-38d2-4886-885e-82898e39ce25