Changed format of CSS in HTML5 boilerplate styles

Began changing CSS writing styles; since this uses Sass *I see no reason for the properties of most selectors in this repository to have their properties and values on a single line* in the Sass files when Compass is set to compress the code during the process. Ergo, for ease of reading and writing, I hereby suggest that the Sass code be a lot more readable for those developing with the styles.