Remote control with mobile device

[jendib]

• POST /player/register: Register a new web player and returns a token to be stored in local storage
• POST /player/unregister?token=[player_token]: Unregister a web player
• WS /player/connect?token=[player_token]: Open a websocket connection to a web player, awaiting commands
• POST /player/command?token=[player_token]: Push a JSON command to a web player