Added social tags

Found this quick bounty.

*  Used the first mock up of a [collection as the image](https://github.com/asm-products/octobox-landing-page/blob/master/lib%2Fimages%2Foctobox.png).
*  Updated package.json to build from npm install. Missing bower.
*  Left FacebookId as a placeholder. Not sure if there's a page or anything. Can always remove it in a separate commit.