Use jPlayer for playback

Change-Id: I53604889c3853e3c88dccfb52895441dc70a9de0
Expand the letter in artist list in tracks tab hash handling

Change-Id: I1c1fe040a22cca2d45d7f04341a71bfb2d6470eb
Add dummy td elements to tracks without album

Change-Id: Ie313f91ebc71055cd44bf98b911252444581f304
Merge pull request #4 from 7k/jplayer

Initial jPlayer adaptations