FLOE-171: Upgraded metadata demo with the new infusion model relay system

@amb26, can you review this pull request, our first pilot of the new model relay.
@cindyli - here is an example of a page we have with such instructions - 
https://github.com/fluid-project/infusion/blob/master/tests/manual-tests/components/reorderer/dynamic/index.html

The script is a verbal set of instructions that are sufficient for a tester to verify that the majority of the component functionality is working