Cache each users currently playing song for 5 minutes

Yolo PR, written in github file editor with no testing :-)
Revert "Cache each users currently playing song for 5 minutes"

This reverts commit c19e73797ac90645ca1d4513d242362f3e5a68b2.
Cache each users currently playing song for 5 minutes

Yolo PR, written in github file editor with no testing :-)
Merge pull request #11 from humanmade/caching

Caching