Clean more with Grunt

Sometimes I get conflicts in the generated files we use (mainly `raw-files.min.js`) and Grunt fails for me. This solves that for the `grunt` task, but `grunt dist` then simply ends up with a deleted `raw-files.min.js` since that's not part of the `dist` task.

Any help in separating this would be awesome—I'm fried at the moment.

<3