Android TestCoordinatorLayout

A CoordinatorLayout demo for studying it.And it coded with listView combined with beheavior definited by myself.(结合listView自定义beheavior实现的CoordinatorLayout的测试demo)； CoordinatorLayout结合自定义beheavior，listView的使用， listView作为toorBar的anchor，CircleImageView依赖toorBar， 利用自定义的CircleImageView的beheavior实现：滑动listView时，toorBar和CircleImageView随着分别渐隐渐现和放大缩小等效果。