add weixin controler for verify weixin

app/assets/javascripts/wei_xin.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

app/assets/stylesheets/wei_xin.css.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the wei_xin controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/wei_xin_controller.rb

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+class WeiXinController < ApplicationController
+
+  def verify
+    echo_str = params[:echostr]
+    render text:echo_str
+  end
+end

app/helpers/wei_xin_helper.rb

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+module WeiXinHelper
+end