Make it easier to test set uploads in development

[emhoracek]

It's annoying to test uploads now that uploading requires user authentication. We would like it to be quick and easy.

One idea is to have a function that adds a test user only in development, and code that automatically logs you in as that user only in development. But I'm open to other ideas!

If you want to go with my idea:

In the initialize function, check the ENV envar to see if it is "devel" (in development mode). If so, use createUser to create the user testy with name Testy McTestPerson and email test@test.com. Use setLoggedInUser with "testy" so testy is always logged in.

[emhoracek]

Going to go a different way, with uploads permitted without an account.