Edits to readme

Hey Brian,
Thanks for writing this great post! 

You're onto something and your post is one of the best sources of current and relevant content on the subject. I've read it a few times.

I made a few edits;
- Added a Table of Contents for easy reference.
- I noticed a few typos so I fixed those
- In Sublime, the the links make it hard to follow the sentences. So, I simply pushed them to the wall. 
_(This does not alter appearance in the markdown.)_

Thanks again!
Dave