Guard, PG, Bourbon, Q

Adding guard to auto-run specs, rewriting specs to use `let` and thus be **a lot** faster. The whole suite runs in 3 seconds now. Also added the ability to edit comments.
```
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /Users/eiriklied/.rbenv/versions/2.1.3/bin/ruby extconf.rb 
Command 'qmake -spec macx-g++ ' not available

Makefile not found

Gem files will remain installed in /Users/eiriklied/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.3.0 for inspection.
Results logged to /Users/eiriklied/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/extensions/x86_64-darwin-13/2.1.0-static/capybara-webkit-1.3.0/gem_make.out
An error occurred while installing capybara-webkit (1.3.0), and Bundler cannot continue.
Make sure that `gem install capybara-webkit -v '1.3.0'` succeeds before bundling.
```