Syncing up with H5BP 2.0.

Created a new topic branch and synced up with the 2.0 release of H5BP.

I still keept your styling variables they are in the top of the normalize partial.

I diffed the final output of this and it matchs the raw H5BP 2.0 CSS except...
 - whitespace/comments. (obviously)
 - I kept your .ir helper. (small differ no big deal) 
 - I didn't include the "Media Queries for Responsive Design"
     - Note: When SASS 3.2 is released we can look at adding them because mixins can receive blocks.
     - https://github.com/nex3/sass/commit/f01cae3d7d16b7512482286774ab3420f57e7f49#diff-0
     - https://gist.github.com/1231870/2f359e67c6b5a8e61512373f5b9f26842ad7623d

I bumped the version but you might want to do it differently depending on what you think. 

Let me know how you feel about this.