I kinda-sorta into quote threading.

Unread count is completely broken with this, so I'm keeping it in
its own branch until I fix it.

Also code is a mess.
Well, I was stupid. Oh well.
Completely remove Unread functionality from Quote Threading
And make Unread Quote Threading aware.

Also kill Random Access List
Finish up.
Merge branch 'v3' of github.com:zixaphir/appchan-x into v3

Conflicts:
	builds/4chan-X.js
	builds/4chan-X.user.js
	builds/crx/script.js