Implement inverted prop.

[arendjr]

This PR implements the inverted prop. Its purpose is simply to revert the scoll direction (ie. the first item will be rendered at the bottom). The name and purpose of the prop are the same as the inverted prop for React Native's own FlatList component. The implementation simply uses Android's setReverseLayout() method.

Hope you find this useful!

[godness84]

Thanks @arendjr, but there's a problem with header and footer. In the current implementation they are put inside the body of RecyclerViewItem when the item is the first (header) or the last element (footer). When the list is inverted, header and footer are misplaced.

It's not the best implementation, for example when you swap the first and second items the header is animated with the second item, instead of being fixed at the top. Anyway it works.

I have a fix ready, it switches header and footer placing them in the right position when passed to RecyclerViewItem.

How can I commit it on your branch? Or should I create a new branch on my side?

Or you prefer to fix the entire implementation of header and footer placing them not inside the body of RecyclerViewItem?

[arendjr]

Oh, great! My use-case didn't involve headers or footers, so I hadn't noticed that one yet. But I see you already managed to push to the branch, thanks! As far as I'm concerned, it's good to go 👍

[godness84]

New v0.3.4 release!

[arendjr]

Thanks!