Merge pull request #607 from hugovk/master

Fix test coverage
Coverage badge in README [ci skip]
SVG Travis, and Coverage badge in docs [ci skip]

The SVG badge uses the Shields project for consistency with other projects' badges.
More info:
http://blog.travis-ci.com/2014-03-20-build-status-badges-support-svg/
Use SVG Travis CI badge [ci skip]
Fix alt text [ci skip]
Merge pull request #612 from hugovk/patch-1

Badges: SVG Travis, and coverage in README [ci skip]
Merge pull request #613 from hugovk/patch-2

Badges: SVG Travis, and Coverage in docs [ci skip]