Adds library for sorting

Jira issue: APPPARTY-55
Sorts the playlist but seems to throw away the click events.

Jira issue: APPPARTY-55
Fixes the click events.

Jira issue: APPPARTY-55
Merge pull request #26 from eelcocramer/APPPARTY-55

Adds sorting for the playlist
Update README.md

Add reference to jPlayer
Merge pull request #27 from mjprins/patch-1

Update README.md
APPPARTY-57

Update NOTICE with jPlayer license info 
Merge pull request #28 from mjprins/patch-2

APPPARTY-57