added 16pixels.css

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