Is there a way to do this that does not depend on less? Or is that the bootstrap that gets generated will have this in it?

the generated file will not depend on less

As fat said, the actual css file won't depend on less. I forgot to generate those with the initial commit for this pull request. I went ahead and ran a make build now.

It would seem that this is not in the most recent 1.3, I'm guessing its been missed out of the make build?

No this isn't in bootstrap. I've removed the code and closed the pull request. Turns out that this version wasn't as fully thought out as it needed to be.

Take a look at the 2.0-wip branch though. There is responsive stuff being added there that will be much more robust.

Thanks for the pointer and I agree that inclusion shouldn't be by default for responsive. Great work, keep it up!