Using the standard parse function for creating entities does not generate an entity_id

[Rosencrantz]

the parse_ftm function should include the create of an entity_id value. This should be able to be defined within the yml but if it is not then it should be created from a hash of the url

[sunu]

I would suggest we use the same mechanism that we use in mapping - let the user supply a list of keys and use those properties to construct a unique and idempotent entity id.