added atelier colorschemes

Hi Ivan,
Made some colorschemes with [Base16 Builder](https://github.com/chriskempson/base16-builder), and [hacked a demopage](http://atelierbram.github.io/syntax-highlighting/atelier-schemes/demo/highlight-js.html) out of yours, ...

[Bram de Haan](http://atelierbramdehaan.nl)