Split out forks into their own classes

[CalamityJames]

Large rework of the way forks are handled, splitting out into their own classes.

This makes adding support for an extra fork much easier.

I have also converted #26 to work with the new class system, thanks go to @wateredstorm for his work on that :)

Forks tested:

• Asner Monocle fork
• Monkey Monocle fork
• Sloppy RocketMap fork
• Vanilla Monocle
• Vanilla RocketMap

I am open to any suggestions or improvements for how we handle new classes, at the moment they are all loaded in an array in config/default.php

I have also merged in #13 to here, as it saves having multiple PRs open from me!

[baskettcase]

I don't know if you'll want this, but this is a lib file for Asner's Monocle PR, not his fork.
Monocle_Asner.php.zip

Maybe this isn't Asner.. but it's for this Monocle PR: Noctem/Monocle#306

[beloware]

Now setup, yet monkey fork.

[ecology99]

With this new PR, with RM default I always get this error:
https://prntscr.com/gk0eqk

[cptmedic]

Sorry for being picky, but for consistency (and because I know someone will eventually ask) in config.example.php from // default/asner/sloppy to // default/asner/sloppy/monkey

[CalamityJames]

@captainmedic Done, thanks for the suggestion!

[tobias86aa]

Sloppys fork seems to be working good.

[Demokdawa]

Works perfectly well with lastest commit :p

[cptmedic]

Monkey branch works on CentOS 7. I have not test the discord include button as the discord is private, but everything else that I use is confirmed working on my instances