WIP on new project form: first step done

Step 1 (project name) is now looking good.
WIP on new project form: create mock upload API

While developing the upload form, we're going to want to "upload" many
zip files without actually importing the data into any projects. Create
a mock version of the uploadProjectZip API call that will return a
success result without touching the data model or the filesystem, for
use in development and in testing the upload UI.
WIP on new project upload: step 2 done

Initial data upload is now looking pretty good.
WIP on new project upload: step 3 done

Data verification step is looking good.