As far we have planned, this is the _only_ html page served by oq-engine-server. Everything else just operates on REST and JSON.

This is really just a simple solution for the need to upload any number of input models, so the form needs to be slightly dynamic. (Technically, this could be done with just plain javascript, not jQuery, but jQuery makes this a lot easier.)

At the moment, I'd like to keep it as-is. If we start doing something more sophisticated, we can look into a cleaner solution. Is that okay?