WIP: first prototype of the JSON API.

* Tests not included, so I cannot prove that it works

app/controllers/api/base_controller.rb

@@ -0,0 +1,3 @@
+class Api::BaseController < ActionController::Base
+  protect_from_forgery
+end

app/controllers/api/v1/conferences_controller.rb

@@ -0,0 +1,7 @@
+class Api::V1::ConferencesController < Api::BaseController
+  respond_to :json
+
+  def index
+    respond_with Conference.all
+  end
+end