added 16pixels.css

suggest adding a css file with typography rules that is independant from any frameworks like bootstrap or CSS resets. Handy anis first to include in my new webproject

the demo here http://shimansky.biz/libs/16pixels/shimansky.biz/index.html
the pages tha use it http://portfolio.shimansky.biz/

Thank you very much for collaboration

Serguei Shimansky