release-0.8

This release improves the standard library a little, but is being made mostly to transition the testing and release process from TravisCI to github actions:

• github-action-tester
  • Used to run tests.
• github-action-publish-binaries
  • Used to make releases.

Changes include some additions to the standard-library:

• type works on built-in functions.
• There is a file-object.
• There are facilities to run mkdir, chmod, etc.
• Test cases updated and improved.