Added multi_expand option for accordion

Updated section configuration documentation
Added stopPropagation to prevent duplicate click events.
Fixed loading of data-options overrides in resize function
Check if nav has the sticky class before adding or removing it. Not checking causes severe framerate drops as addClass was called continuously during page scroll.
Remove emCalc from topbar breakpoint
Documentation change and em-calc backward compatability
Merge branch 'master' of https://github.com/zurb/foundation
Sync upstream and recommit
Merge branch 'master' of https://github.com/rvinay88/foundation-1
Merge pull request #3080 from rvinay88/master

Remove emCalc from topbar breakpoint
remove duplicate code
aloks change to variables.scss, -margin-bottom set to 0
Merge branch 'master' of github.com:zurb/foundation
Merge pull request #3059 from olafurnielsen/master

Check if sticky nav has the fixed class before adding or removing it.
Made  display: block important. Fixes issue with using jquery show on error labels.
Merge pull request #3093 from VoiceOfWisdom/important-error

Made  display: block important. Fixes issue with using jquery show on error messages
Callout panel links to be white in color
Changed variable name to be more precise
variable name change
Closing Dropdown when a Reveal link is clicked