Export [[notes]] somehow instead of ignoring them completely

[mcepl]

screenplain/screenplain/parsers/fountain.py

Lines 256 to 259 in bc719b6

	as_string = note_re.sub('', '\n'.join(input_lines))
	if _is_blank(as_string):
	continue
	paragraph = InputParagraph(as_string.split('\n'))

With this code the codes are ignored when parsing .fountain source document. I believe this is the wrong solution for #37; according to https://fountain.io/syntax#section-notes:

Notes are designed to be compatible with the types of inserted annotation common in screenwriting software, e.g. Final Draft's Scriptnotes. To hide, or "comment out" sections of text, use the boneyard syntax.

which seems to imply to me, that (contrary to boneyards) notes should not be hidden, but displayed in some special way (different colour?), so they are outstanding from the text. They should be used for internal meta-comments (“This needs more work.” or “Thank you for this idea to John Smith.”), displayed, but they are not part of the action on the screen itself.

[onerandomusername]

I know this is an old issue but notes are actually hidden output.

Its not quite clear, but in the Sections and Synopses syntax description, there's this:

Not all screenwriting applications support synopses or sections, but most support some kind of invisible markers, such as Notes

To me, this furthers my understanding that Notes are not supposed to be shown in formatted output.