Feature/issue #22 allow direct to bucket uploads for file fields

[thclark]

# Summary Adds ability to directly upload files to the cloud, rather than sending them via the django server. This uses a new 'BlobField' that has the capacity to store blob metadata in the database.

Contents (#29)

New features

• Add direct upload form widget

Operations

• Add extra bucket with object verioning for demos and tests
• Widen CORS for local development and add safety note
• Prettify precommit file
• Add tailwind config to prettier
• Add container features and update container settings spec
• Add pylint extension to stop vscode nagging
• Bump version

Other

• Add BlobField to docs