GSoC'20: Add support for FHIR Narratives

For the Location resource, all the examples here just mention a brief location summary (kind of a general address) in the narratives, even if the resource object carries more detailed information with it. This example displayed the maximum info in its narrative, among the other examples, which is still a subset of all the info carried by the object.

So how should we create our narrative for the Location resource? Should we mention each element in the narrative? Or should we rather keep it minimal, the way it is in the examples?

cc: @ibacher @herbert24 @suthagar23