v0.2.0

This release includes:

• Support for pybind11 docstrings.
• Add a tutorial to explain how to get started using the package.
• Support PEP-484 annotations.
• Allow type information to be passed to the parser.
• Issue warnings for args that have no documentation.
• Add several configurable options to the parser.
• Fix extraction of multi-line function signatures.
• Fix over-loaded functions.

A big thanks to @gcarleo for his help with this release.