Create Chisel website and documentation

[luboskmetko]

A simple page presenting Chisel, based on the index page design

[thymikee]

Removing the milestone, as it's a presentation layer of Chisel, not tied to the generator itself. Looking forward for this page though! 👍

[jakub300]

Tools used by various sites:

• https://facebook.github.io/react/ -> http://jekyllrb.com/
• http://redux.js.org/ -> https://www.gitbook.com/
• https://vuejs.org/ -> https://hexo.io/
• https://onsen.io/ -> http://www.metalsmith.io/

[luboskmetko]

Thanks, adding some more:

• https://timber.github.io/docs/ - http://gohugo.io/
• https://www.gatsbyjs.org/ - this one looks pretty interesting, would be nice if we can build the site as PWA to test things and learn something new