Closes #1882
Updates to interchange.
fixed bug with centered column floating across small/large
Update indentation
Fix for clearing thumbs layout #2068

Bug demonstrated here:
http://lukebussey.com/foundation-clearing-bug/

Fix demonstrated here:
http://lukebussey.com/foundation-clearing-fix/
Updating _clearing.scss styles to match that of docs.scss and removed code from docs.scss
Added glowing effect option for inputs
Merge branch 'master' of https://github.com/zurb/foundation
Added glowing effect mixin
Orbit bullet color variables fix

$orbit-bullet-nav-color and $orbit-bullet-nav-color-active we're not
used anywhere so I applied them to the orbit bullets which I'm assuming
they were for.
delete redundant "if", "try catch"
add semicolon
remove unused param
Normalize file input width to 100% to prevent overflow on mobile layouts.
Merge pull request #2213 from shikolay/master

Some minor clean up for JavaScript code
Fix typos in docs
Merge pull request #2216 from abutler3/editing_docs_javascript_sass

Fix typos in docs
Update dropdown positioning calculations based on offsetParent.
Check if clearing event target is link or image.
Bump Clearing to 4.1.3
updated dead link