Implement doc generation and upload

[dignifiedquire]

Generation using

• documentation.js
• clean-documentation-theme

Documentation upload during aegir-relase by using the technique from here:

• https://github.com/huonw/travis-cargo/blob/master/travis_cargo.py#L120-L149

[dignifiedquire]

Found https://www.npmjs.com/package/gh-pages which does the publishing super nice and is available on JavaScript.

Currently blocked on using gulp-documentation due to documentationjs/gulp-documentation#27