Note that the schema currently supports both string and object analysis in the
"analysis" field of a result.

* Added pre-commit: http://pre-commit.com
* Fixed flake8 errors
* Added flake8 pre-commit hooks
* Added pre-commit to Makefile
* Changed VERSION numbering
* Changed versioning to match PEP-0440

* Added debug Dockerfile/Makefile
* Validation of examples in docs