The Augmented BNF for messages converted to regex

[martindilling]

Mostly direct translation of the Augmented BNF for an IRC message to a giant regex. It takes a raw IRC message and returns an array with:

`prefix`     // The whole prefix string
`nickname`   // The nickname from the prefix
`username`   // The username from the prefix
`hostname`   // The hostname from the prefix
`servername` // The servername from the prefix
`command`    // The command
`params`     // The parameters

I'm pretty sure this can be optimised quite a lot, but for now it parses following the specification and it works ;)

[garethellis36]

Nice job!

[olorton]

:+1: