百度云页面
Merge branch 'develop' into feature/UI_develop

* develop:
  完成user_show页面
  完成动态功能
  fixed bug:  show wrong milestone_name when the project has no 'doing' milestone
  activities功能准备阶段
  完成user_detail页面
  fixed bug#4
  fixed bug: 图片字符串验证不正确
  fixed bug#3
  fixed bug#1
  输入图片检查机制，图片loading时显示loading图片
  user_detail基本功能
  mysql socket
  fixed bug #2

Conflicts:
	app/assets/stylesheets/users.css.scss
	app/views/extra/tips.html.erb
Merge branch 'develop' into feature/UI_develop