增加CLabelUI和CRichEditUI，完成初步移植，仅能编译通过，未测试
Edit控件初步测试完成
修复了底层部分Bug和设计缺陷
修复因看错m_arrayWindowMessageFilters、m_arrayPreMessageFilters过滤机制导致的RichEdit无效Bug
初步测试CRichEditUI
Merge pull request #2 from duilib/2.0

2.0