Import Sean's changes from master into topbar and foundation.js
Updated the docs for visibility classes
if there's no images, consider them loaded
Merge branch '5.0-wip' of github.com:zurb/foundation into 5.0-wip
Pass fast selector to libraries.
Add migration plugin to docs temporarily for testing.
Merge pull request #3346 from laantorchaweb/abide-isequal-validation

Abide isequal validation
js media queries should be based on small-up, medium-up, large-up
Merge branch '5.0-wip' of github.com:zurb/foundation into 5.0-wip
rename includes to .html extension (compile errors otherwise)
create a compile:assets task that travis can run
Converted the typography docs
Corrected typo on block grid page
coded pagination docs page
Converted the pricing table docs
Added pagination centered mixin example
Fixed some grid display styling issues
Coding new grid docs page
Added shading to columns in grid displays to make them distinguishable from rows
Changed markdown headings to html where appropriate