使用CoordinatorLayout，AppBarLayout，CollapsingToolbarLayout，Toolbar，TabLayout等， 实现下拉头部图片拉伸、上滑Tab悬浮效果
https://github.com/zhukui/CoordinatorLayout-master.git
https://github.com/ToDou/appbarlayout-spring-behavior
http://gundumw100.iteye.com/blog/2366683
https://github.com/JmStefanAndroid/EasyBehavior