Week4 （July 22-July 28）
- Enable reminder function.
- Add balance page.
- Add plane page.
- Improve @ function.
- Add node navigation.
- Add online people and hightest online people.
- Add Google search.
- Add thanks function.
- Add daily checkin bonus.
- Add balance related functions.
- Member could delete his reply within 5 minutes.
- Add captcha.
- Add hottest and latest node.
- Add hot topic.
Fix many bugs, especially multiple requests caused by repeated rendering.
- Add QQ login/signup method.
- Enable mod members to manage the community more easily.
- Start writing backstage system.
- Enable more functions, depends on demands.
Find and Fix more bugs.