update CHANGELOG
window.scrollY works in Chrome and Firefox.

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
	src/General/Index.coffee
Eh, the debounce is kinda pointless.

Conflicts:
	builds/4chan-X.user.js
	builds/crx/script.js
	src/General/Index.coffee
update CHANGELOG