Merge pull request OHDSI#182 from OHDSI/v2.0-integration-candidate

V2.0.0 Release

Gracefully handle empty criteria groups in cohort definitions.

Fixes OHDSI#155

logging

Applying PR OHDSI#126 as hotfix for 1.3.2.

Fixes OHDSI#122.

Truncate/drop #cohort_ends temp table.

Fixes OHDSI#121

Do not apply QualifiedLimitFilter when additional criteria is null.

Fixes OHDSI/Atlas#198

Sort source service /sources result by SourceKey.

Fixes OHDSI/Atlas#182

Concept needs to include all properties when serializing JSON.

Closes OHDSI#113. Fix large concept set export