[中文] 具有下拉刷新和上拉加载更多功能的RecyclerView，提供好抽象的下拉刷新用header和上拉加载更多的footer，方便扩展及自定义。
具体接入请参考demo。
[English] A RecyclerView with pull to refresh and load more function. See the demo for more information. Providing abstract header for refresh and footer for load more. Which is easy to be extended and rewrite for your own customization.
