modified types????

[Laboredih123]

Fixes #473
Implements modified types by smuggling a json of the modified types all the way to createobject

please review my code thoroughly, i suck! there's probably a lot of things that can be improved!

[Laboredih123]

so true github

[wixoaGit]

Honestly not a fan of the JSON solution, and it makes some things like new /datum{foo = new} impossible, but this is a fine stepping stone.

[Laboredih123]

oh yeh gotta fix that too

[amylizzle]

It is generally upsetting to take expressions and smuggle them into the runtime in json format. I realise this was always going to be kinda hacky, but ew.

The modified types tests also contain atoms now, which they shouldn't anymore. Please change them to datums instead of objects.

This is behaviour that works in BYOND but not here:

/obj
	var/a = 5

/proc/RunTest()
	var/obj/o = /obj{a=6}
	ASSERT((new o).a == 6)

Seems to work good on paradise and goon though!