Updated arguments to side-radius mixin in pre/postfixed buttons and pre/postfix spans and labels so that they work correctly when rtl.

Added a check for text direction when setting the background-position of the arrow on select elements.
Added support for fieldset[disabled]
New variable $topbar-button-top

It's impossible (or I didn't get it right) to center horizontally a button inside a topbar with a custom defined height.

Added a new variable $topbar-button-top to fix this issue
Added $topbar-link-padding variable
fix incorrect refs from interchange to equalizer
Fixed a bug with a comment and couple properties being over included as a result of an improper export
Merge pull request #4364 from velvetkevorkian/equalizer-docs-fix

fix incorrect refs from interchange to equalizer
reflow equalizer on initialization otherwise equal height doesn't take affect until window resize
Merge pull request #4322 from Grafikart/5.0-topbar-link-padding

Added $topbar-link-padding variable
Added space to -link-padding variable.
Merge pull request #4311 from Grafikart/5.0-add-topbar-button-top

New variable $topbar-button-top
remove call to import range-slider
Merge branch 'master' of github.com:zurb/foundation
Fixed prefix and postfix border radius
Merge branch 'master' of github.com:zurb/foundation
Fixed offcanvas for RTL
Changed default back to LTR
Changed dir back to default
Fixed RTL button groups
adds missing namespace declarations in magellan