update to html5-boilerplate 4.3.0
Add :format and :keep_original options to :asset_hash. Closes #1257
Merge pull request #1255 from binaryphile/h5bp

update to html5-boilerplate 4.3.0
start trying to figure out how much relies on Compass
Implement sass path helpers directly in Sass support (instead of compass or sprockets
more work