Produce Demo Video

[bradley-holt]

• Produce a short demo video (example: https://youtu.be/hsq0sUAM-1I)
• Add a "Watch the Video" section to the README (example: https://github.com/ibm-watson-data-lab/shopping-list-polymer-pouchdb/blob/master/README.md#watch-the-video)

[bradley-holt]

Moved this to Icebox. Given that this repo will be included as part of an aggregate Hybrid Mobile App Code Pattern, having a separate video for each repo is no longer as important. I'm considering this a "nice to have" at this point.