message: Add master coverage badge and put develop coverage next to develop build
diff: # ember-osf-web
  `master` Build Status: [![Build Status](https://travis-ci.org/CenterForOpenScience/ember-osf-web.svg?branch=master)](https://travis-ci.org/CenterForOpenScience/ember-osf-web)
  +[![Coverage Status](https://coveralls.io/repos/github/CenterForOpenScience/ember-osf-web/badge.svg?branch=master)](https://coveralls.io/github/CenterForOpenScience/ember-osf-web?branch=master)
  `develop` Build Status: [![Build Status](https://travis-ci.org/CenterForOpenScience/ember-osf-web.svg?branch=develop)](https://travis-ci.org/CenterForOpenScience/ember-osf-web)
  -
  [![Coverage Status](https://coveralls.io/repos/github/CenterForOpenScience/ember-osf-web/badge.svg?branch=develop)](https://coveralls.io/github/CenterForOpenScience/ember-osf-web?branch=develop)
  This README outlines the details of collaborating on this Ember application.
  