[fixed] line break between badge rows in README
[fixed] line break between badge rows in README

Summary: Using whitespace at the end of the line was being stripped by Sublime, so I replaced it with a `<br />`.

Reviewers: O2 Material Motion, #material_motion

Tags: #material_motion

Differential Revision: http://codereview.cc/D3477

material-motion/indefinite-observable-js,material-motion/indefinite-observable-js