Merge pull request common-workflow-language#487 from common-workflow-…

…language/1.0.1-text

Update text to v1.0.1.

Merge pull request common-workflow-language#263 from common-workflow-…

…language/better-writable-test

Adjust conformance test for "writable" flag.

Add README with license.

Use w3id.org namespaces

.. which also gives permalink to the current draft

Draft 2 final edits.