initial

added basic structure, basic scss files, and two modules
added aspect-ratio module

Based upon:
http://www.fettblog.eu/blog/2013/06/16/preserving-aspect-ratio-for-embed
ded-iframes/
http://www.mademyday.de/css-height-equals-width-with-pure-css.html
added aspect-ratio module
first compiled version

not compiling is not clever. here's the first compiled version +
documentation for tables