Updates to get docs building

Thanks for putting together what looks like a great tool!  I'm evaluating it for a project and was correcting what I think are some typos in the docs (see #18).  On a fresh clone of the repo, I couldn't get the docs to build (with `npm install && grunt`).  I had to make the changes below in order to get a successful build.

I'm curious if you've considered keeping the build artifacts out of the `master` branch?  It might make it easier for others to contribute if the built docs were in a `.gitignore`d directory.  Then you could use something like the [`grunt-gh-pages` task](https://npmjs.org/package/grunt-gh-pages) (shameless plug) to push the built docs to your `gh-pages` branch.

In any case, thanks again for making this available.