add a decorator to cache dynamic properties for better efficiency
use cached propery decorator; split out ego graph & nx node id into separate methods
better error handling/type checking for profile view
simple, preliminary tests for profile view
move rdf person and location classes from groupsheets.models into people.models
rdf fixture for tests; unit tests for basic rdf person & location logic
unit test for connected people logic [#49309035]
unit tests for connected people logic [#49309035]
add list of connected organizations to connections on profile page [#49309035]
test for list of connected organizations on profile page [#49309035]