2015-04-12 Weixin::Client v1.4
1）将登录cookie保存到本地，再次登录免扫码

2015-04-12 Weixin::Client v1.3
1）修复文档错误

2015-04-12 Weixin::Client v1.2
1）继续修复文档错误
2）修复demo中示例代码错误

2015-04-12 Weixin::Client v1.1
1）修复文档错误
2）on_receive_message/on_send_message回调名称修改为on_receive_msg/on_send_msg

2015-04-12 Weixin::Client v1.0 release