1）QA界面优化提问框显示
2）QA界面完成分页功能
3）注册模块在优化邮箱验证，在密码弱时仍可注册

Signed-off-by: An <lasdtc@gmail.com>
Merge branch 'master' of https://github.com/zhengjiabin/ISharing.git

Conflicts:
	.settings/org.eclipse.core.resources.prefs
	WebRoot/QA.jsp
	WebRoot/QA_Answer.jsp
	WebRoot/css/QA.css
	WebRoot/js/QA.js

Signed-off-by: An <lasdtc@gmail.com>