update README
add more logging to document processing
fix bug in custom xml serializer with m2m

- [finishes #44423091]
Move TranslationFidelity to be a URI

- Since TranslationFidelity is a contstrained code, we will now store it
  as a URI instead of 3 dummy fields
- finishes [#44973859]
move rdf.py from lib

- in advance of adding in more rdf handling, move into it's own rdf directory
Add in initial transforms for RDF/XML

- Added in method for registering new RDF/XML transforms
- Added in convenience classes for building SMART SPARQL queries
- Initial support for SMART Medication RDF/XML, not including Fills
- finishes [#44318963]