Add support for checking history in Requests mechanism, though we probably won't use it! FIx not passing uid to requests
A new way to wait for requests (more practical)
Deleting ideas is now done by the Requests mechanism. Preparing for next major step in this mechanism with getFirstRequestByUIDAndType
use getFirstRequestByUIDAndType to make sure that a user's work can be restarted (with a little help from the client, which we haven't implemented yet)
Change login mechanism to report queue status; Make remove idea use the Queue mechanism