24437 - using the z-index calculation

There is a flag in the modal that allows the z-index to be computed and
I added a +1/-1 to the results to (hopefully) force the overlay to be
under the popup.
Update new app config.
Update README.md
Update README.md
Update README.md
Update README.md
Merge branch 'master' of https://github.com/gsn/cdn
Update README.md
Update with latest assets from Digital Store.
Merge branch 'master' of https://github.com/gsn/cdn
node serverApp.js work for both cdn and tfs.
Merge pull request #182 from gsn/master

Merged from master.