Add event hooks to clearing

Trigger events open.fndtn.clearing, opened.fndtn.clearing,
change.fndtn.clearing, close.fndtn.clearing, closed.fndtn.clearing at
appropriate spots.
Add documentation for clearing events

Docs and examples for open.fndtn.clearing, opened.fndtn.clearing,
close.fndtn.clearing, closed.fndtn.clearing and change.fndtn.clearing
Change event names in doc to match event names in code.
Add new event resized.fndtn.clearing

This event occurs after an image has been resized, so you can access
the new image size.
Removes px unit declarations from values of 0 in foundation scss files.
Removes px unit frmo values set to 0 in foundation docs.
Merge pull request #3298 from mrmrs/remove-px-from-values-of-zero

CSS cleanup
Update labels in Joyride demo to be less confusing
add changelog for 4.3.2 and update versions
don't attempt to interact with self.settings.$topbar if undefined
bump to 4.3.2.rc1
Fixed collapsed input radius on iPhone
Merge branch 'master' of github.com:zurb/foundation
Remove noradius example from tooltips docs page
Fixed input radius on iPhone
bump to 4.3.2
Merge branch 'master' of github.com:zurb/foundation
Support ajax form handling with in Abide.
Merge branch 'master' of github.com:zurb/foundation
Merge pull request #3220 from anitagraham/add-events-to-settings

Add events to clearing