Merge pull request #4 from qiuqi/master

正确解密消息
聊天窗口发送消息，和接收消息
Merge branch 'master' of https://github.com/majiajue/MxMsg

Conflicts:
	src/com/mx/client/MainFrame.java
	src/com/mx/client/netty/NettyClientHandler.java
	src/com/mx/client/webtools/RSAEncryptor.java
比对代码
修正消息接收和发送的bug
增加了好友列表的添加删除功能
工具类
增加界面内容