v0.2.0-alpha

New Features:

• feat(plugins): use a new plugin system
  • The previous plugin system worked but was limited and, in particular, not especially friendly to private plugins or to different end-users wanting to download/use different set(s) of plugins.

BREAKING CHANGE: any old-style plugin will need to be re-written

• Plugins are now each a separate python distribution package
• Plugins must produce a pypi distribution containing a package whose name starts with "johann_"
• Specify which plugins you want in plugins.txt
  • You may use pip requirements file syntax
• A plugins.default.txt is provided
• 'make prep' will copy the default over if plugins.txt does not exist
• A "johann_plugin_example" repo is forthcoming

Changed:

• docs: update AUTHORS
• chore(dev-ux): add pre-commit hooks
• docs: update README.md