Jamdict

- Added ``lookup_iter()`` for iteration search
- Added ``pos`` filter for filtering words by part-of-speeches
- Added ``all_pos()`` and ``all_ne_type()`` to Jamdict to list part-of-speeches and named-entity types
- Better version checking in ``__version__.py``
- Improved documentation

PyPI release: https://pypi.org/project/jamdict/0.1a11/

- Fix data audit query
- Enhanced Jamdict() constructor. `Jamdict('/path/to/jamdict.db')`
works properly.
- Code quality review
- Automated documentation build via
[readthedocs.org](https://jamdict.readthedocs.io/en/latest/)

- [Data package](https://pypi.org/project/jamdict-data/) can be installed via PyPI with `jamdict_data` package
- Make `lxml` optional
- Make configuration file optional as data files can be installed via PyPI.
- Add [documentation](https://jamdict.readthedocs.io)

- Added Japanese Proper Names Dictionary (JMnedict) support
- Included built-in KRADFILE/RADKFile support
- Improved command line tools (json, compact mode, etc.)

- Use latest puchikarui library (disabled DB design warning by default)
- Faster search
- Provide pre-built jamdict DB