Overview
Upon signing up on WriteFreely, users are dumped into a plain editor. We should provide a bit of guidance for what to do next.
Implementation
Now
Provide some default text that mentions how to use the editor. Show it once to the user (so: add a userattributes entry that says the user has seen it when they first load the Pad) and only if they have 0 posts (because they might've registered and interacted only via API).
Later
Let admin customize this text from the dashboard (TODO: create task)