add lowercase spacing page to proof

[traviskochel]

Maybe I missed it, but it would be helpful to have a page in the proof where you could better evaluate the spacing. Similar to how you have this one below for the uppercase.

In lowercase, rather than HH OO for context, I usually use non ono. Like this: non[glyph]non ono[glyph]ono.

[bghryct]

@Afrotype this should be an easy fix. Also perhaps using some of the strings that are found on the impallari testing page https://www.impallari.com/testing/ in the kern tab would probably be useful to see cap to lowercase etc.

[Afrotype]

Thanks @traviskochel . Uploaded the most recent proof here.

[bghryct]

This is completed so I'm closing it as complete.