Redo the responsive utilities stuff

* Update docs language
* Enforce display: block; on all utilities for now
* Fix up docs CSS for the tests
Simple responsive utilities test css
remove prettyprint js mention
Form validation and horizontal row update

* changed .row-label to .control-label as used elsewhere already
* changed .formFieldState mixin to .form-field-validation
Nuke rem font-size mixin
Fix broke dropdown navbar example
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip
Change up link alerts

* No more children selectors to set all links in alerts as a special color because buttons and more wrongly inherited color
* Adds .alert-link for easy styling in any alert
Run make on latest JS
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip