Revised README

I worked on updating and basically completely rewriting the README to something more polished. I still need to add more sections and revise what I have, but I think that it’s alright. I’m trying to strike a balance between not having enough content and being a wall of text. It’s also surprisingly difficult to come up with bullet points for the features list.

After I finish up the README, I’m going to redesign the home page a bit. After that, I think I might be ready to ship.