added travis CI test

.travis.yml

+language: ruby
+bundler_args: --without development
+rvm:
+  - 1.9.3
+  - 2.0.0
+  - 2.1.0
+script: "rspec"
+services:
+  - redis

README.md

 # WeixinAuthorize
 
 [![Gem Version](https://badge.fury.io/rb/weixin_authorize.png)](http://badge.fury.io/rb/weixin_authorize)
+[![Build Status](https://secure.travis-ci.org/lanrion/my_mongoid.png?branch=master)](http://travis-ci.org/lanrion/my_mongoid)
 
 Support using [Redis](http://redis.io) to store `access_token`
 

spec/spec_helper.rb

@@ -19,6 +19,10 @@ require "multi_json"
 require "redis"
 require "redis-namespace"
 
+ENV["APPID"]="wx986f04063d341d04"
+ENV["APPSECRET"]="1a941cd88cb4579ba98ec06b6813af03"
+ENV["OPENID"]="o9k6BuB0kydAcPTc7sPxppB1GQqA"
+
 redis = Redis.new(:host => "127.0.0.1",:port => "6379")
 
 namespace = "weixin_test:weixin_authorize"