r3.31
Merge branch 'master' of https://github.com/OHDSI/OMOPV4_PCORNetV1_ETL

Conflicts:
	OMOP-PCORNet r3.3.sql
r3.4
Merge pull request #6 from writetoritu/master

Update to documentation and Encounter query (provider_id) field
r3.4

Add WHERE clause to eliminate all null rows in Vital.
Merge pull request #2 from OHDSI/master

updating with the OHDSI master