Deploy live preview to GitHub Pages

[hagenburger]

This requires #44 to be finished.

Check this blog post on the details: https://medium.com/superhighfives/deploying-to-github-pages-with-gulp-c06efc527de8

I already set up the gh-pages branch and configured GitHub to use it. Results will be visible on https://hagenburger.github.io/pimd/.

[violetadev]

Test github

[violetadev]

Deploy to Github

[benevbright]

Can't wait for this will be done.

[violetadev]

I created a branch with the deploy files, when the livedemo is merged I'll PR it :)