Pycognaize

- Define Field data_types in to_dict methods
- Add area to IqDataTypesEnum David A minute ago

- Move FieldMapping to `field.__init__`
- Fix circular import in fields
- Use super().to_dict() in Field objects

- Fix Document.from_dict page iteration
- Add field types to Field.to_dict methods
- TableField allows no tags when calling to_dict method

- Update Dockerfile entrypoint to pycognaize.app.rest
- Fix SnapshotBuilder.create_document_zip cls.DB assignment expression

- Update changelog, fix all versions to 0.3.0b6

- Update all tests (75% coverage)
- Merge branch 'master' into major_refactor
- Add Snapshot to `pycognaize.__init__`
- Use scandir in DocumentBuilder._populate_pages
- Update import statement for Mapping
- Fix SnapshotBuilder to work with new Snapshot class
- Remove FieldMapping from DocumentBuilder, use a separate module instead
- Snapshot uses lazy_dict for reading individual documents
- Use `tempfile` module in model.py
- Add doc_file (document.json) to SnapStorageEnum
- Add AreaField to `field.__init__`
- Add to_dict and from_dict methods to Document class
- Add test coverage in tox
- Merged in add_test_for_overwriting_snapshot_in_s3 (pull request 47)
- pull updates from major refactor and merge with current branch, remove test_service, add test_store_snapshot_with_same_name
- Merge branch 'major_refactor' into add_test_for_overwriting_snapshot_in_s3
- add unittests to test snapshot overwriting, change overwriting log message
- Allow 'from pycognaize import Model'
- Add doctests to text_field module
- Update sphynx conf.py
- Update build_docs.sh to also build pdf documentation file
- Update setup.sh logs
- Move all setup configurations from setup.py to setup.cfg
- build_docs.sh generated html and pdf documentations
- Add doc/source/generated/ to .*ignore files