Move datalayer into project, add simple debug menu

subscribeToCampaign should now be imported from this package and not vwo-ab-datalayer.

import { subscribeToCampaign } from "react-controlled-ab/datalayers/vwo/Datalayer"

usage is the same otherwise and is backwards compatible. This release has no breaking changes.

Multi mount points for a single campaign

Multi mount points for a single campaign, add state tracking for if experienced was received.
Allow suppression of fallback experience

First stable build

Merge pull request #3 from GoAheadTours/add-typing

Add typing to EvergageTestComponent state