- Removed mixins for generating grid classes
- Thus, we manually declare every grid class, from 1-11 (12th unit is
excluded as that's the same as no grid columns)
- No more need for `.col` base class (yay!)
- Negative indent the rows at tablets and above once again (ugh, still
working through this part)
- Add support for `.col-md` for tablet-specific grid columns
- Still need to figure out offsets, pushes, and pulls on other
devices—right now only available on desktop

* Add start and end support to the horizontal gradient as well
* Change all variables from camelCase to use-dashes
* Better comments in the gradients mixins area
* Update current uses of gradients in dropdowns and carousel to specify only two values by direct assignment of variables

Vertical gradients now can have percentages passed in as arguments to allow finer control over the backgrounds it produces

* changed .row-label to .control-label as used elsewhere already
* changed .formFieldState mixin to .form-field-validation

* Use 1.428 for line-height instead of 1.5
* Use  function for full pixel values instead of decimals

* Instead of , use  for standard, gray button
* Improves ability to customize buttons by encouraging folks to not override .btn and thus overriding all button modifier classes
* Updates docs to reflect the change
* Reorganize buttons CSS

Previously the filter had GradientType=0, which would render a vertical
gradient rather than the horizontal one implied by name

Remove all #font mixins; replace single instance of its use in Bootstrap with the @font-family-monospace variable

* Added a new mixin to calculate rems and pixels for IE fallback
* Updated the body, p, and .lead elements to use the new .font-size() mixin
* New mixin has default value of 14px or 1.4rem
* Still needs exploration, and change this means lots of work rejiggering margins and line-heights
* Related, started to reorganize the mixins a bit to call out mixins that are used by the framework and not utilities or snippets

* Uses .btn on label elements with nested checkbox and radio controls within
* Updated examples to reflect change in HTML and CSS
* Had to add .active all buttons for proper state highlighting (mimicing the :active pseudo state)
* Still needs JavaScript plugin updated by @fat

* Add new grid mixins adapted from Preboot (http://github.com/mdo/preboot)
* Drop the @grid-row-width and @grid-column-width variables
* Add the @grid-float-breakpoint variable, as used in Preboot
* Add support for .push* and .pull* classes for column ordering manipulation
* Document all the things

Ref #5319 - This rule is causing pixelated edges on iOS. Removing
it makes everything smooth across all OS's, browsers, and devices.

* Remove .darken-button-states and .buttonBackground mixins (latter wasn't being used anyway)
* Create new .btn-pseudo-states mixin for setting button background and border colors for default and pseudo states

* Instead of .divider-vertical, use .divider
* Makes use of .nav-divider mixin
* Dividers are horizontal to start, matching the default state of navbar nav links
* Dividers become vertical above 768px via media queries

horizontal three color gradient added