New personalised usernames

In version 11 of the software we introduced support for students being able to choose their own login name. This was limited to the fact that you could not use a login name that another student (from another school) was already using...

Boo hoo...

So, we re-wrote the entire system; and now users can choose the same login name no matter which school they are from. So, go ahead; and make up some crazy login names!