Helpers

You can apply responsive helper classes to almost any element, in order to alter its style based upon the browser's width.

Float	`is-clearfix`	Fixes an element's floating children
	`is-pulled-left`	Moves an element to the left
	`is-pulled-right`	Moves an element to the right
Overlay	`is-overlay`	Completely covers the first positioned parent
Size	`is-fullwidth`	Takes up the whole width (100%)
Text	`has-text-centered`	Centers the text
	`has-text-left`	Text is left-aligned
	`has-text-right`	Text is right-aligned
Other	`is-marginless`	Removes any margin
	`is-paddingless`	Removes any padding
	`is-unselectable`	Prevents the text from being selectable
	`is-hidden`	Hides element