If I remember correctly:

- 1.3 leaves newlines and trailing semicolon
- 1.4 strips trailing semicolon
- 1.5 strips newlines (so it's one giant line)

As far as I can tell, none of these behaviors are optional.

From `git blame`, it looks like Brian used 1.4 most recently, so we can stick to that to reduce churn. I was planning on updating less to stable (1.6, currently) when we update to Bootstrap 3, since that will be a bunch of churn, anyway.

    npm install -g less@1.4.2