Fix for Firefox's image width bug

Fix for Firefox bug #975632 - https://bugzilla.mozilla.org/show_bug.cgi?id=975632.

I created an issue for this - https://github.com/zurb/foundation/issues/5576.
Merge pull request #1 from zurb/master

update to Foundation origin
change `background` to `background-color` in tabs to allow styling of theis other background properties
Switch to compatible dash character in comments

Prevents error on SASS compile referenced in #5398
Fix for #5556 - Wrap division with parentheses
Fixed typo on abide docs
Merge pull request #5608 from xaro/patch-1

Fixed typo on abide docs
Updating Magellan examples
Move JoyRide and add switches to kitchen sink
Merge branch 'master' of https://github.com/zurb/foundation
Updating JS Files to 5.3.3
Merge branch 'master' of https://github.com/zurb/foundation
icon-bar-size mixin was not using the parameters passed to it
Tweak CSS styling support of dialog:  account for ::backdrop and minimize unnecessary, repetitive extending of existing styles
Merge pull request #5611 from Batterii/icon-bar-issue

icon-bar-size mixin was not using the parameters passed to it
Merge pull request #5605 from chrisjlee/master

Fix for #5556 - Wrap division with parentheses
Merge pull request #5602 from lineardevon/master

Switch to compatible dash character in comments
Merge pull request #5577 from brettdewoody/patch-2

Fix for Firefox's table image width bug
Merge pull request #5604 from Grawl/master

change `background` to `background-color` in tabs to allow styling of tabs other background properties