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
updated html file reference on getting started page
added article for multiple dependencies
Update sections docs to include reflow explanaction.
Merge branch 'master' of github.com:zurb/foundation