Sticky List Headers

[nesquena]

We need a guide on adding sticky list headers:

• https://github.com/TonicArtos/SuperSLiM
• https://github.com/timehop/sticky-headers-recyclerview
• https://github.com/beworker/pinned-section-listview
• https://github.com/applidium/HeaderListView
• https://github.com/JimiSmith/PinnedHeaderListView
• https://github.com/emilsjolander/StickyListHeaders
• https://github.com/applidium/HeaderListView