Update the version to 0.37.0

Update the version to 0.36.0

Fix some missing commas

Update the version in the schema ID to 0.34.0

Update the "Best practices" list

It replaces the list in "Constraints and errors". That section now points to
"Best practices".

Improve the "Strings and string lengths" section in the README

Also fixing up the references.

Update the CHANGELOG with the latest changes

Update the CHANGELOG with 0.30.0 notes and the README with the new ve…

…rsion

Updating the latest part of the CHANGELOG to use code formatting wher…

…e appropriate.

Adding a "Questions" section to the "Design notes" section in the REA…

…DME.