Fixes DEVELOPER-748

I think, anyway. Local testing is inconclusive.

Adding DCP changes and using it in the javascript

I completely forgot about this (the dcp part). We need this added to the
environments to make use of this.

Adding the sandbox quickstarts to be experimental too.

Removing include_in_all
Merge pull request #336 from LightGuard/DEVELOPER-748

Fixes DEVELOPER-748
Update cdn.yml
Cleanup
DEVELOPER-876 Add demo type to DCP