Create a deploy task that copies build artifacts to `dist` and then publishes that to git pages

[MiguelCastillo]

[BrianGenisio]

I'm using the yeoman generator for reveal.js, and it uses Build Control to publish to the gh-pages branch. Looks cleaner that what we're doing now.

This is the config in Gruntfile.coffee that it uses BuildControl to push to gh-pages:

        buildcontrol:

            options:
                dir: 'dist'
                commit: true
                push: true
                message: 'Built from %sourceCommit% on branch %sourceBranch%'
            pages:
                options:
                    remote: 'git@github.com:BrianGenisio/js-robotics-lightning-talk.git'
                    branch: 'gh-pages'