v0.11.1 Documentation improvements; bug fixes

• New documentation produced to support hackathon.
• New tool for comparing Excel models
• Addition of pytest dependency

v0.11.0: migrated/enhanced tools

Complete transition of tools to openpyxl library. New guides and documentation.

V0.10.0 Start versioning releases

Merge pull request #302 from ProjectDrawdown/packaged-data

missed packaging data