v0.3

• Add options --strip-regex and --yaml-strip-regex for filtering out Fold markers. See docs/fold-markers.rst for details.
• Add an example for formatting as definition lists.
• Make examples' HTML-build deterministic by removing the version
  number.
• Add support for Python 3.
• Convert the module into a package.
• Enhance the test-suite.
• Move the project to the debops group for shared development.
• Enable CI-tests (at Travis-CI).