Pass classes from options to li elements in custom dropdowns
Update foundation.section.js

Added check to see if content area exists.  This is to ensure that sections without content areas are handled by the browser. (Linking to pages, instead of content)
Update foundation.section.js

Made a typo in previous commit
Fix quotes in CONTRIBUTING.md

Very minor fix - addresses the issue that as written creating a
Gemfile in CONTRIBUTING.md does not work due to improper quotations
in the echo command
Update grid.html.erb

The 3rd row in the Centered Columns section example has "large-uncentered" applied in the code but not in the example which is off-putting. This just adds it to the example as well.
Merge pull request #2397 from mhchen/fix-contributing.md-quotes

Fix quotes in CONTRIBUTING.md
Merge pull request #2402 from alexweber/patch-1

Update grid.html.erb
Copy original link to dropdown list in topbar.
Add click state configuration to topbar, optimize hover state detection for tootlips.
closes #1707. Added ability to wrap Orbit inside a div.slideshow-wrapper to avoid a flash of unstyled content. We also included an optional preloading animation.
added example of preloader
Merge branch 'master' of github.com:zurb/foundation
Closes #1751. Changed orbit-slides-container > * to use height: auto instead of 100%.
Set topbar height to the height of the current ul.
Merge branch 'master' of github.com:zurb/foundation
Fix topbar edge cases, make is_hover a data option.
Closes #2027. Made default no-js styles to default to expanded accordions for all variations of sections
Closes #2037. Added a global variable to control the output of vendor prefixes
Add hover state support for dropdowns by setting is_hover data-options.
Merge branch 'master' of github.com:zurb/foundation