Include PyYAML, upgrade packages

Merge pull request #29 from aclowes/move-deps

enable token auth and make yaml required

Add readonly support

Allow the anonymous readonly permission class to be used, which still hiding user API tokens.

Add healthcheck endpoint

To support deployment on GKE and behind other load balancers.

Redirect to SSL on static files

• Move whitenoise to middleware so https redirect works on static files
• Add link to GKE deployment

Refresh page & table styling

• Improve the task history table styling to be more readable
• Add a button for refreshing the page

Users

• add user model and admin interface
• better frontend tests

Add webserver

• add gunicorn and static server yawn webserver
• add python callable helper yawn exec
• allow tasks without a workflow
• use yarn and bump JS libraries
• fix dagre-D3 import
• add frontend tests

Initial release

v0.1.0

Merge branch 'circleci'