First pass at README
First pass at README

This highlighted a couple of API issues to fix. Need to fix those and
then continue on this.

reactabular/reactabular,kaushik94/reactabular,megawidget/reactabular,reactabular/reactabular,adjohnson916/reactabular,kaushik94/reactabular,adjohnson916/reactabular,rdoh/reactabular,megawidget/reactabular