Lo-Dash & Underscore?

I'm curious why you have [lodash & underscore](https://github.com/addyosmani/todomvc-backbone-es6/tree/gh-pages/app/bower_components) folders?  Could a [lodash.underscore](https://github.com/lodash/lodash/#download) be needed, or could just the Underscore references be changed into Lo-Dash?
