Added Support for StaggeredGridView by maurycyw.
Remove PullToRefreshStaggeredGridView.java
PullToRefreshAdapterViewGroupBase.java files if you are not using
StaggeredGridView.
Added Support for StaggeredGridView by maurycyw.
Remove PullToRefreshStaggeredGridView.java
PullToRefreshAdapterViewGroupBase.java files if you are not using
StaggeredGridView.