Split up values into 'pretty' or more useful values

[DanielOaks]

For instance, with PREFIX we should also be splitting this: "(ohv)@%+" into:

• "(o)@"
• "(h)%"
• "(v)+"

Do the same for each PREFIX value we interpret and count the stats on each of those 'pretty' values separately. It would make for more useful stats in this case, and in the case of other CAP/ISUPPORT values.

[DanielOaks]

This is now on the site for the PREFIX and CHANTYPES tokens. If it makes sense for others, we'll add it.

[DanielOaks]

Actually, let's do this for these tokens as well:

• CMDS
• ELIST
• STATUSMSG