Fix spelling errors

$visibility-hidden-list
Fix line height issue
Remove topbar from off-canvas

There is no need to have the topbar component added to off-canvas (as shown in the docs with the minimal example).

There was also a misspelling in the visibility component which was causing an error during the build, which I fixed.
Merge pull request #6 from zurb/master

Update Foundation
Fixed malformed Data URI

Removed a space from a URL in the form-select mixin that was causing
Ruby's URI.parse method to throw an error. Can't 100% guarantee that
spaces in data URIs are actually against spec, but my reading of RFC
2397 suggests they aren't, and it'll decode the same without the space
anyway.

Ran into the issue when using a gem (sinatra-assetpack) that attempts to
parse URLs in CSS to see if they can be "cache busted".
test travis
Finish examples_accessibility_visible.html
Update visibility.html
Fix bad code
Update _grid.scss

duplicate .#{$size}-reset-order
Add load autoprefixer and cssmin

I may be missing something obvious here but grunt returns errors because cssmin and autoprefixer aren't being loaded. This seems to fix the problem.
Add support for table caption

Provides styling of table caption element
Provides more configuration of side nav

Adds a few more variables to configure headings and link hover background
Merge pull request #5019 from sjonnet19/patch-1

Fix spelling errors
Merge pull request #5030 from winghouchan/accessibility-visibility-docs

Update Docs for New Accessibility Classes
Merge pull request #5029 from voigtan/patch-1

Update _grid.scss
Merge pull request #5021 from zslabs/master

Remove topbar from off-canvas
Merge pull request #5020 from sjonnet19/patch-1

Fix line height issue
Merge pull request #5014 from voku/fixes_for_top-bar

+ revert: (line-height) changes from "_top_bar.scss"
Merge pull request #7 from zurb/master

Update Foundation