[minor] numbered lists in markdown docs

[phrawzty]

Right now the README.md has a numbered list which renders properly when viewed in GitHub, but when viewed as text contains a series of non-sequential numbers. This drives me nuts.

Options:

1. Using just the number 1 over and over, and relying on GitHub to render it properly.
   1. Confusing if it's not rendered properly (or viewed as text).
2. "Enforcing" manual ordering as a pre-requisite to merging.
   1. Definitely works but is irritating to maintain.
3. Using bullet lists.
   1. Easy to maintain, consistent behaviour - but it's not numbers.

[mattstratton]

I vote for option one as it is "correct" Markdown.

[bridgetkromhout]

I'm addressing this in #175.

[phrawzty]

Alright, so, number one number one number one it is!