Merge pull request #8 from wdw1206/master

 ReplaceStatement can't be supported,use insert into ...on duplicate key update... instead
Merge pull request #9 from wdw1206/master

调整druid解析流程，消除重复代码，使代码结构更好
增加输出提示
NIO Read优化，取消中间过程的变量记录
Merge pull request #10 from opencloudb/master

优化NIO Read过程，避免中间变量
fix an NullPointerException
Merge pull request #11 from runfriends/master

fix an NullPointerException
calenader to local var
回退分组的代码修复bug
Merge pull request #12 from coderczp/master

回退分组的代码修复bug
Merge pull request #14 from opencloudb/master

move calenader field to local var
集合改为并发集合，解决多线程写入的异常（Group )
Sorter 类集合用并发集合
Test类中增加排序的测试SQL
Merge pull request #15 from opencloudb/master

排序分组的集合用并发集合解决同步的BUG
NIO read=0导致CPU 100%的问题修复，重构了MulitQuery的一些问题
Merge pull request #16 from opencloudb/master

NIO read=0导致CPU 100%的问题修复，重构了MulitQuery的一些问题