Ebi submit page

_Mostly_ there. This is not linked up yet, so you have to go to the page manually (e.g., `localhost:8888/ebi_submission/1`. Second, `send` is forced to `False` right now so it is not sending. The actual submission is done on a worker, and allows for a somewhat general way to submit arbitrary compute with a waiting page.

It is awkward to push and publish messages, and I think there is a better way, but this works as far as I can tell.
Yeah, This may be a problem. The messages for the user are stored in that channel, so deleting that will wipe out cached messages for other pages. Right now you have to manually take care of deleting your messages out of that list.