Replace pusher with action cable (#178)

closes #43

app/channels/application_cable/channel.rb

@@ -0,0 +1,2 @@
+class ApplicationCable::Channel < ActionCable::Channel::Base
+end

app/channels/application_cable/connection.rb

@@ -0,0 +1,2 @@
+class ApplicationCable::Connection < ActionCable::Connection::Base
+end

app/channels/room_channel.rb

@@ -0,0 +1,5 @@
+class RoomChannel < ApplicationCable::Channel
+  def subscribed
+    stream_from params[:pubsub_token]
+  end
+end