回退分组的代码修复bug
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
	src/main/java/org/opencloudb/mpp/MutiDataMergeService.java
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
resolve conflict

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server
解决测试程序问题
解决测试程序问题
Merge branch 'master' of https://github.com/jaggerliu/Mycat-Server.git
Merge remote-tracking branch 'mycat/master'
Merge pull request #29 from wdw1206/master

1、支持childTable的insert 2、insert语句字符串解析加入一些检验异常，如不给出columnlist的提示，insert ....
动态加载Catlet机制完成
分离定时任务到独立线程池
跨分片Catle DEMO放到 demo.catlets包下
日志的调整等
动态类加载组件
Merge pull request #30 from opencloudb/master

动态Calet机制完成
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
Merge branch 'master' of https://github.com/opencloudb/Mycat-Server

Conflicts:
	src/main/java/org/opencloudb/mpp/DataMergeService.java
在配置文件中增加sharding-murmur-hash
Merge branch 'master' of https://github.com/runfriends/Mycat-Server
Merge remote-tracking branch 'mycat/master'
若异常是IO异常，即连接关闭，就不打印堆栈日志
修复当连接不上的时候Handler为空导致的空指针异常