Pycognaize

- Add script for building sphinx docs
- Minor docstring changes to Tag `hshift` and `vshift` methods
- SnapshotBuilder.DB added only on function call, to speed up module imports
- Add a single doctest to TextField constructor
- Add simplejson to requirements
- Add Model.execute_genie method

- Major refactored version
- Document > DocumentBuilder
(DocumentBuilder has no instance, only methods for creating Documents,
which are now equivalent to DocumentDataclass objects)
- DocumentDataclass > Document
- SnapshotProcessor > SnapshotBuilder
- Changed folder structure (no services package)
- DataSnapshot > Snapshot, DataRecipe > Recipe
- Add tox configuration for py36, py37, py38, py39, pypy
- Add 'MANIFEST.in' (required for 'TOX' to run properly)
- Add 'setup.cfg' for 'pytest'
- './setup.sh' builds and pushes a version, only if no tests fail
- Update README.md
- All tests pass on py36, py37, py38, py39, pypy

- Add docker push command in build.sh

- Change rest service to threaded=False

- Checkpoint version

- Delete numpy from req-s