Normalize line endings.

Currently the line endings are a bit messed up. It's not possible to tell on GitHub, but my development environment (Windows, Git Bash) always flags up line endings.

The way to do things in Git is to always have your text files stored with `LF` in the repository, and then have your working tree contain whatever you'd rather have. However, it is possible to commit things with `CRLF` line endings, which is what seems to have happened.

As well as making things nicer for me this'll also help out Mac/Linux users, I suspect.