code: function sendMessage (options, scope, action, patch) {
    scope && scope.postMessage('redux-sync:' + stringify({
      id: options.id,
      trigger: action,
      patch
    }), '*')
  }
docs: Send triggering action and the complete state.
  TODO: currently restricted to postMessages || could be extend to other channels (e.g. websocket)
  
  @param  {[type]} customOptions [description]
  @param  {[type]} state         [description]
  @return {[type]}               [description]