dfg
latest change

Signed-off-by: Rik Cabanier <cabanier@adobe.com>
refactored polyfill

Signed-off-by: Rik Cabanier <cabanier@adobe.com>
enabled swapping of backdrop

Signed-off-by: Rik Cabanier <cabanier@adobe.com>
Merge branch 'refs/heads/master' into gh-pages

Signed-off-by: Rik Cabanier <cabanier@adobe.com>

Conflicts:
	background-polyfill.js