Update URL to Travis badge

Badge was 404ing as build moved to public Travis instead of Magnum CI.
Travis: Install bower assets
Bower: Change to using https instead of SSH
Merge pull request #12 from boxuk/build-fix

Travis: Install bower assets
Merge pull request #11 from boxuk/badge-fix

Update URL to Travis badge
Update usage documentation
Ignore files from NPM distribution
Change distribution file name
Merge pull request #13 from boxuk/cleanup

Ignore files from NPM distribution
Merge pull request #14 from boxuk/dist-name

Change distribution file name
Change distribution file name
Merge pull request #15 from boxuk/dist-name

Change distribution file name
Add code quality badge
Merge pull request #16 from boxuk/code-quality-badge

Add code quality badge
Adding coveralls