Sqlite-comprehend

- Improvements to the documentation.

- Fixed bug where commands failed to be correctly registered on Linux systems. [11](https://github.com/simonw/sqlite-comprehend/issues/11)

- `sqlite-comprehend entities --strip-tags` option for stripping HTML tags before sending content to the entity extraction API. [9](https://github.com/simonw/sqlite-comprehend/issues/9)

- Documentation, in the [README](https://github.com/simonw/sqlite-comprehend/blob/main/README.md). [#3](https://github.com/simonw/sqlite-comprehend/issues/3)
- New schema design, with a separate `comprehend_entities` table. [4](https://github.com/simonw/sqlite-comprehend/issues/4)
- Running the command multiple times will not re-submit rows that have already been processed. [7](https://github.com/simonw/sqlite-comprehend/issues/7)
- Errors from the Comprehend API are now logged to standard error. [8](https://github.com/simonw/sqlite-comprehend/issues/8)

- Initial prototype. [1](https://github.com/simonw/sqlite-comprehend/issues/1)