FHIR Package not available in FHIR Package Registry #77

See https://registry.fhir.org/results?query=%22fhir.who.ddcc%22&latestFilter=true.

The FHIR Package Registry is the place where all tooling will find the package (like IG publisher, Simplifier, Forge, etc.), so with the package being absent from there it will be hard for others to install it, load it to a server or build a derived specification.

Information on publishing can be found here: https://registry.fhir.org/submit (with the comment that a feed should actually be listed here now: https://github.com/FHIR/ig-registry/blob/master/package-feeds.json, not in https://github.com/FHIR/ig-registry/blob/master/fhir-ig-list.json) or here: https://confluence.hl7.org/display/FHIR/FHIR+Package+Registry+User+Documentation#FHIRPackageRegistryUserDocumentation-Addingapackagetotheregistry