Generated files for v6 release.

5.0 release

Fixed date for v4 release, linked github stub issue page.

Build release files for 3.9Patch

Removed dangling references to WorkBasedProgram's old name.

We used to call it WebBasedTraining; see schemaorg#2289 for discussion.

Fixed link to 3.8/schema-all.html on releases page an made a 3.8 vers…

…ion of it.

Release prepared for 3.7.

Simplified handling of full release files - now redirect to actual file.

Fixed error where jsonldcontext.{json|jsonld|json.txt} were returning…

… with out the correct 'Content-Type:' settings

Reset 3.5 publication date to 2019-04-01