Update video player example with latest grid layout.
Ensure the scroll-watch renders after a page reload 
Also when the images have finised loading.
Implement the 4.0 design into the examples page.

Use more interactive and transition effects. After the user has selected
an example, hide the list so they don't have to scroll around to see the
example. Also move the code to the bottom of the page, because that's
where people will be after they're done seeing it.
Fix validation error in breadcrumbs
Copy/paste fail
Subhead style updates

This fixes the line-height on subheads that wrap to two lines.
wdn-clear class added to clear wdn-cols
changed class selector
use grid-mixins variables
Merge pull request #602 from rklus16/wdn-grid

wdn-clear class added to clear wdn-cols
Remove flexslider class duplicated on next line.
Remove duplicated grid mixin logic
Use inline comment style for developer mixin comments.
Simplify grid selectors using less variables.
Merge pull request #603 from skoolbus39/RD-Updates

Subhead style updates
Merge remote-tracking branch 'kabel/example-page' into develop
Add a bit of padding to the example buttons band
Remove hash from URL when user returns to the list of all examples
Subhead updates

Previous updates didn't need to be wrapped in a media query, should be
apply to all screen widths.
adding a helpers less file
force grid wdn-col floats