Docassemble

Changed
- Upgraded CodeMirror.
Fixed
- Error with `overlay_pdf()` introduced in the last version.

Added
- The `permissions` Configuration directive.
- Ability of `admin` users to create API keys with limited permissions.
- The `multi` option of `overlay_pdf()`.
- The `/api/user_invite` API endpoint.
- The `api key` option of `default admin account`.
- The `allow forgot password` Configuration directive.
Changed
- Upgraded the `boto3` and `docxtpl` libraries.
- The Logs are now shown in a resizable `<textarea>`.
- Safer implementation of `exit link` and `exit url`.
- For safety reasons, `url_of('exit')` and similar URLs no longer
accept `next` parameters.
- The JavaScript for `CustomDataType` objects will only be inserted if
the interview uses the custom datatype.
Fixed
- URL of exit link was being set to `/interview` in some
circumstances.
- When server-side validation failed, the fields the user saw on the
next screen were not always populated with the user's answers.
- HTML typos in `<form>` elements.
- Problem converting DOCX to PDF when `attachment` filename contained
a space.
- Inaccurate exceptions were sometimes raised when `AttributeError` or
`IndexError` exceptions arise during assembly of a DOCX file.
- Fixes to Google geocoding for situations where the latitude and
longitude are undefined.

Added
- The `fax provider` Configuration directive.
- Option for faxing with Telnyx instead of ClickSend.
Changed
- The server name of a `DAFile` can be changed using `.set_attributes()`.
- NLTK data files are downloaded during the building of the Docker
image, so that the initial boot process does not require an internet
connection.

Fixed
- Error with the `.convert_to()` method of `DAFile`.
- Issue with display of modules in the Playground variables.

Fixed
- Issue with the sizing of images inside of `terms` descriptions.

Added
- Support for using `md` as one of the `valid formats` in an
`attachment` when using `content` or `content file`.
- The `enable unoconv` Configuration directive (requires system
upgrade). This provides a faster method for converting DOCX files to
PDF.
Fixed
- When `raw: True` was enabled for an `attachment`, the file was not
included in e-mails sent from the user interface of the `attachment`
block.
- When `raw: True` was enabled for an `attachment`, and the
`DAFileCollection` was passed to `send_email()` or `send_sms()`, the
assembled file was not included.
- Fixed error from 1.3.17 relating to updating references.