Add first pseudo implementation.
Add test framework.

Based on https://github.com/manuelstofer/component-travis-mocha-phantomjs-chai
Find a div in body.
Refactor.
Find spans in the div.
Refactor.
Get rid of underscore.
Add index.html for manual experiments in browser console.
Reformat.
Extract fixture.html for tests.
Check node.attributes before using.