readme update

woohoo I got write access! I had to update my .git/config file in this repo for some reason on the `url` line:
```
url = https://esgibter@github.com/annathecrow/toasty_tools.git
```
This might just be because I am using two different git accounts on one computer and I'm doing something complicated. @destinationtoast you should be able to push to this repo - let me know if you run into issues and I can help debug.

Anyway, here's an example pull request! Feel free to comment on my really exciting changes.