Untwee doesn't work for visually authored games

[alex-calderwood]

untwee doesn't work on any of the files I've experimented with on mac due to these lines:

divs_re = re.compile(
			r'<div id="storeArea"(.*)</html>',
			re.DOTALL
		)
divs = divs_re.search(source)

divs is always empty list, as the regex does not match anything.

Specifically, here is an example that cannot be 'untweed': https://www.brainygamer.com/files/lessons-from-the-lake_tyler_hampton.html

[alex-calderwood]

The issue appeared to be that some games authored with Twine 2 could not be decompiled into Twee because there were additional attributes of the #storeArea div. I authored a fix that shouldn't break any working untwee commands but fixes this use case.