Added
- The `session_local`, `device_local`, and `user_local` objects in the
interview answers.
- The `require login` `metadata` directive.
Changed
- When the API is in use, `interface()` will return `'api'`.
Fixed
- `review` blocks were not compatible with iterator variables.
- `combobox` fields not working right in `list collect` mode.
- `address autocomplete` did not initialize when the address was
hidden by a `show if`.
- Submission blocked when an empty non-required file upload field was
present in an embedded interview.