Add alt tag text where relevant
Brush up of some styles. Bug fixing
Add `spec` coverage for `Refills::ImportGenerator`

* Adds test coverage for generating previously defined snippets. Provides a hook
  to test future snippet generation.
* Includes `middleman-gh-pages` in `Gemfile`
* Add Travis support
  * declare `rspec` rake task
  * setup `.travis.yml`
Clean up tabs
Alphabetize components, patterns and type systems
Tiny fix to modal
Remove the unneeded "push" div for sticky footer

Rather than use an extra div, use the :after pseudo-element on the
.wrapper-for-content-outside-of-footer div.
README restructure