Remove BOOTSTRAP_RESPONSIVE_LESS in css compile

fixed typo in typography documentation

Fix docs.html Table Row Danger CSS Class

No more needed in Bootstrap 3

[3.0.0-wip] Reordering variables that were being used before they were declared. Fixes compiler crashes.

* Fix some typos, grammar, sentence structure
* Fix left-over error tr class
* Remove uneditable inputs section
* Make compatibility sections stand out as sidenotes
* Make modal example scrollable on big screens, too
* Make some examples more self-explanatory

Reordering variables that were being used before they were declared. Under some compilers (dotless & sublime 2 package), this would cause the compile to break. Variables in question were:

@dropdown-link-active-bg
@navbar-link-color
@navbar-inverse-link-color

Fully update docs to col-...-* schema

Correct all span, push, pull, offset classes to col- schema
Fix a typo

variable update - fixed

Remove -webkit-backface-visibility on skew mixin

Update docs to add warning about accessibility implications of using icons without any text

Added heads up regarding lone icons providing accessibility issues for screen readers.

Fix typo in docs

updated docs, changed out span* for col-span-*