Rename files, update README

README.md

@@ -156,7 +156,7 @@ Some practical changes to the fonts themselves have been made, including:
 - I've **normalized metrics** for all fonts to a **20% line height** (using `font-line percent 20`). Some fonts rendered poorly on Kobo devices with the line height slider all the way to the left. This fixes that. Some fonts have not been modified if their line spacing was even smaller.
 - Incorrect **PANOSE metadata has been corrected** where necessary (using [panosifier](https://github.com/source-foundry/panosifier)). This ensures that the fonts render correctly on Kobo devices. For some fonts, incorrect information meant that the fonts would always render using their Bold style, for example.
 - Certain fonts have had their **glyphs rescaled**. Certain fonts have had their glyph sizes increased by 10%, making them seem visually larger, and more consistent in size with the other fonts included in this collection. If you like to stick to a certain font size, you won't need to constantly tweak things if you swap to a different font.
-- The Kobo Collection versions of the fonts are optimized for Kobo devices. They were **re-exported with an old style `kern` table** to ensure improved kerning is applied for the `kepub` render on Kobo devices.
+- The Kobo Collection versions of the fonts are optimized for Kobo devices. They were **re-exported with an old style `kern` table** via [kobo-font-fix](https://github.com/nicoverbruggen/kobo-font-fix), to ensure improved kerning is applied for the `kepub` render on Kobo devices.
 
 ### How are these fonts licensed?