Remove <br> from promo titles to fix l10n.
Fix Bug 840746: Add JavaScript form errors.

Adds a JS shim that detects if HTML5 form validation is supported and,
if it isn't, activates some simple form validation. The only attribute
supported is required since it's the only one we use.
Review fixes.
Added loading indicator to the button

Let the user know something is happening while we wait for a response from vimeo.
Fix Bug 848000: Implement feedback for demoralization.
Fix Bug 870819: Update early entry dates in FAQ
Bug 854725: Add CSS to fix slides in locales.