添加默认codec handler和framelength handler。
修改项目编码为UTF-8
1.优化netconfig配置
2.增加connectorManager
3.增加log
Merge branch 'master' of https://github.com/yfei/mango-netty

Conflicts:
	src/com/yang/mango/netty/client/ClientImpl.java
	src/com/yang/mango/netty/server/ServerImpl.java
	src/com/yang/mango/netty/sim/codec/MessageToMessageCodecImpl.java
	src/com/yang/mango/netty/sim/handler/ChannelDuplexHandler.java
	src/com/yang/mango/netty/spi/INetService.java