Support for multiline dialogue in fountain editor

[tillarnold]

It appears that in the editor multiline dialogue is not indented. As an example consider DAN's dialogue in these screenshots from ThiefMD 0.2.3.

Editor:

Preview:

I think if the _Permanently_. line could be indented like Then let's retire them. is it would help the visual clarity of the editor.

Thank you for your work on ThiefMD!

[kmwallio]

Thanks for raising this, I'll take a look at our regexes and rules to see if I can fix this.