SDR PoC edge services

[bmpotter]

Streamline the POC and focus it on only machine learning insights.

• [x] Design: https://ibm.ent.box.com/notes/291971113942
• [x] Move code to open-horizon/examples
• [x] Sdr service
• [x] Sdr2msghub service (currently modifying it for encoded ogg file, and mocking from internet radio)
• [x] Sdr2msghub require the gps service and get lat/lon from it
• [x] Msg Hub deployed/configured
• [x] Compose Postgresql deployed and schema defined/set
• [x] IBM Functions action to analyze audio with watson services
• [x] Basic SDR UI and Map added to SDR UI <-- moved to https://github.com/open-horizon/examples/issues/98

(Moved mock part to https://github.com/open-horizon/examples/issues/109)

Part of https://github.ibm.com/Edge-Fabric/project-summary/issues/4

[varatep]

Since the UI is getting more complex, should we have a separate issue for UI-related items? @bmpotter

[bmpotter]

Varatep, makes sense. I opened https://github.com/open-horizon/examples/issues/98 . Add checkboxes to that one as appropriate.