PDFs, Cover and Community Copies!

Hullo! I finally got around to prettying this up a bit. Here are the changes made today:

• PNGs have been replaced by a PDF.
• Screenshots, a cover and a banner have been added (and cute orange buttons)
• Community copies have been added as a "reward"! There'll be ten monthly (for now, I'll evaluate when I see if they get used up or not), so feel free to grab a copy if you want one!