Invenio-records-files

- increase invenio-files-rest version to provide signals for d
eletion and uploading files

- Adds link factory for files and record
- Fixes the blueprints building

- Fixes missing entry point definition for the extension, causing the extension
and config not to be loaded.
- Fix issue with when used with Flask-Talisman.

- Backward incompatible changes to API.

- Initial public release.