Allow clearing to load from closest A not parent

Currently clearing loads images from the current item if it's an `a` tag or from the parent of the current item or failing that it falls back to the item it's self. This means that the only way to load an image from the `a` tag is if the `img` tag is the direct descendant. By changing to use `closest('a')` instead of `parent()` then we gain more flexibility in the HTML we can use.
Rectify styles being cached permanently in issue 5827
Incorrect pseudo-element being referenced in dropdown button styling
Fix range slider with label
Add x-only named media queries with documentation
Fix doc formatting
Fix code formatting
Added functions to check Foundation media queries with JS
Fix docs closing tag
Fix usage of $active-color in mixin
changing position to absolute allows background to extend beyond window position
allows user to choose background attachment container

allows scrolling of modal window with background present.
adds ability to choose both modal container and background container independent of each other.
Small whitespace cleanup in Foundation core.
Fix indentation in dropdown.js among others.
.postfix .button slightly misaligned #6053

Proposal to solve #6053; to be tested in Mac enviroment and IE
Fixed a typo

Wordpress -> WordPress
Settings duration and easing for magellan
Update foundation accordion

rename all hardcoded content class ('.content') with => '.'+settings.content_class
Removing extraneous tab characters from _toolbar partial.
Added size-based collapse/uncollapse to .row

While it isn't the proper place in the code, it works well and allows for someone to add/remove padding with class-based Foundation.