Up# OMOPv5-to-PCORnetv3 Conventions for Storing PCORnet attributes in OMOP CDM and OMOPv5 to PCORnetv3 ETL document

As of August 18, the development copies of the Conventions and OMOP to PCORnet ETL documents have been moved to a private google docs account to allow simultaneous editing to be done. Completed version of the documents will continue to be posted in github.

An updated version of the OMOPv5 to PCORnetv3 Convetions checked in Dec. 5, 2016.