Phase 4, Release v3.10.0

This release contains one update:

• Majority of #431 (containing #528, #529, #530, #531 and #532 ): Observational Studies

For the above update, test examples and CORE rules will be added in a point release.

In addition, the current mappings in the IG were evaluated and updated to v3.10.0

• #535, Review and update mappings