Allow nickname support

[Hopson97]

This will allow people to chnage their nickname.

Nicknames people have set would appear next to their messages, for example:

Person A: Hello.
Person A: How is everyone doing?
Person B: I am good, you?
Person A: Yeah I'm good..
Person B: Nice.

etc etc

[Lagicrus]

Question is how at first are they going to do the system? We haven't reached the part wherein users can join and chat.
I assume that it is going to be done on the first sign in bases where unless you have a nickname in your cookies you have to create one. Or go by device name/login name/etc.

[ear1grey]

I'm not convinced we need a name. Names affect what people say and how they say it.

[Lagicrus]

Then how would we know who is who? MAC Addresses? IP Addresses?

[jacekkopecky]

We'll think about it some more. Often, though, we don't need (or want) to know who is who.

Anyway, we don't plan to have users and passwords – proper authentication is out of scope of what we can do in 3-4 lectures.

[GenericGitHubProfile]

Rather than using usernames, which could identify someone, perhaps allowing users to choose a text colour to type in would be better.
This would maintain anonymity but also help differentiate between speakers.

You could also randomly assign a colour to each user on connection, maybe based on the client's ip address.