fix upload script
refactor s3 connection and add s3 delete receiver
upload is already protected, no need for csrf
typo
merge master
Merge branch 'master' into feature/artifact-auto-delete

Conflicts:
	utils/upload_artifact.py
try and fix tests
Revert "try and fix tests"

This reverts commit 356250b76a39a9b6fac73529467738e418f80bd9.
that's how upload tests work
Merge pull request #3 from mindsnacks/feature/artifact-auto-delete

Automatically delete S3 secured artifacts