Mention integration with Grunt and Gulp.

I wanted to make a PR for this instead of just merging it directly. Just in case there was a specific reason you didn't want this stuff in the docs.

I ended up reverse engineering the stream stuff from the code to be able to integrate it with Gulp the way I did, but I got it! Thought I'd share the knowledge with others via the official docs! And maybe a blog post. I am always needing new topics... lol.

Anyway, I also threw in mention of your Grunt plugin for some buzzword love.