Docassemble

Added
- The option for using Google Cloud Vision when using `ocr_file()` and
`ocr_file_in_background()`.
Changed
- When `new template markdown behavior: True` is set in the
Configuration (which is now part of the default initial
configuration), `template` variables do not have the `markdown`
filter automatically applied when they are used in a DOCX template
file. It is recommended that you add this to your Configuration,
and then modify your `docx template file` templates that use
`template` variables, adding ` | markdown` if necessary.
Fixed
- Improved efficiency of system shutdown. (Requires a system upgrade.)
- Problem with Let's Encrypt certificates not renewing. (Requires a
system upgrade.)
- The `single_worker.log` file was missing from log rotation.
- Erroneous exceptions could be raised if a `DAObject` attribute name
began with `_`. Attributes can begin with `_` but they cannot begin
with `__`.
- The `DBSSLMODE`, `DBSSLCERT`, `DBSSLKEY`, and `DBSSLROOTCERT`
variables were not affected by `ENVIRONMENT_TAKES_PRECEDENCE`.

Added
- The `default language` specifier in `metadata`.
- Recipe for running reports.
Fixed
- Some functions did not work in `on change` code.
- UI issue with comboboxes.

Changed
- Favicons not present will not be referenced in HTML.

Added
- The `favicon tile color` Configuration directive.
- The `favicon version` Configuration directive.
Changed
- Favicon feature now uses the package version number when available.
- Favicon feature now supports `site.webmanifest`.
- Additional logging during server restart.
- UI accessibility improvements.
Fixed
- Problem importing unclassified machine learning entries from JSON.

Changed
- `complete_attribute` can refer to a list of attributes.
Fixed
- Markdown-to-HTML conversion was not being applied to the `pre` or
`submit` screen parts.
- `[TARGET ...]` was not working in `html`.
- Issues with the Training page.

Added
- The `custom datatypes to load` directive under `features`.
- The `set_variables()` function.
- The `process_objects` parameter for `set_session_variables`.
Changed
- Support for importing and exporting `datetime.date` and
`datetime.time` objects in the JSON representation of objects.
- `input type: area` text boxes are resizable in both dimensions.
Fixed
- Issue with `show if` and `labels above fields`.
- Issues with using SSL for external PostgreSQL and Redis connections.