Implement Paging Library and paging support

[kingargyle]

1. Add to client an option if it supports paging content.
2. If it supports paging content on a RecyclerView then add an PagingAdapter implementation.
3. Otherwise use the existing Adapters.

https://developer.android.com/topic/libraries/architecture/paging/

[kingargyle]

Implement lean back Paging Adapter.