Implement API Resources to allow the Player to Push State Change

[krak3n]

Currently Soundwave uses Redis to communicate state change to the API which is represented int the FE. Once #65 is merged we will be able to make the changes on Soundwave and Shockwave.

Resources Required

GET /player/queue/next

This resource will get the next track in the queue so it can be preloaded by the player.

DELETE /player/queue/next

This resource will remove the track from the top of the queue, to be called by the player once the track has started playing.

PUT /player/current

This resource will be used by the player to update the current playing track. This would also publish a play event for the FE.

DELETE /player/current

When a track ends the player will use this resource to publish an end event.