Updated platform/category images

[HVR88]

If you're interested in a large selection of additional platform/category logos that you can use in your theme, I started a repo a little while back to store and update all the logos I've been making. They're all available as svg and png @ 600px width.

Take a look: https://github.com/HVR88/Monochrome-Gaming-Logos

Plenty of uncommon designs and logos not found anywhere else. The collection is about 620 logo variations right now.