Wildmap v2.0.0-alpha.0

• Tidy package.json. Closes #8.
• Redux of the concept for use as directory tree. Closes #9. Closes #10. Closes #11.
• Build with Node.js 16 on Travis CI. See #8.
• Build with Node.js 14 on Travis CI. See #8.
• Build with GitHub Actions. See #8.
• Add .npmignore. See #8.
• Update .gitignore. See #8.
• Remove old test shell programs. See #8.
• Remove coveralls from Travis CI.
• Convert to Edify README.md with clicklets. See #8.
• Build with Node.js 12 at Travis CI. See #8.
• Set aside old README.md. See #8.
• Rename test directory to test. See #8.
• Upgrade Proof to 9.0.3. See #8.
• Update LICENSE for 2021. See #8.

Closes #12.