Split constants and styles

constants can be imported into many files, but we don't want to do that with the styles.
Merge pull request #2 from wwwpol/master

Split constants and styles
File organization based on http://www.sitepoint.com/architecture-sass-project/
main style file imports everything, individual files do not
removed README.html
Merge pull request #3 from fs-webdev/architecture

Architecture