WIP: refined freesurfer directory and stats extraction and upload script

ready for comments and feedback - @nicholsn and @dbkeator - give it a shot locally - upload to triplestore is presently optional

- integrated into a single script both directory modeling and stat extraction
- now does subject name anonymization (uses search and replace)
- can upload to a writeable triplestore
- when anonymizing generates a local rdf map between new id and old id

TODO/Needs verification
- refine upload - can fail sometimes on the metadata.incf.net triplestore even with a 100 statements.
- terms list