Merge pull request #1 from zurb/master

Update Foundation
Change :before pseudo-element to :after

As discussed here: https://github.com/zurb/foundation/issues/4960 the :after pseudo-element would be more semantically correct.
Change :before pseudo-element to :after

As discussed here: https://github.com/zurb/foundation/issues/4960 the :after pseudo-element would be more semantically correct.
Merge pull request #4986 from winghouchan/semantic-dropdown-construct--4960

Semantic dropdown construct  4960