How might we support screeners being embedded in an existing website?

[prestoncabe]

As a benefits analyst,
When I create a screener,
Then I should be able to easily embed the new screener within an existing website.

Extracted from #97

some ideas for implementation:

• tooling to easily export/include in another site
• create a demo site that uses the tooling? (use phillypropertytax.org site for this?)