Fix Sass deprecation warnings
Fix Sass deprecation warnings

Conflicts:

	test/acceptance/stylesheet_test.rb

forresty/integrity,integrity/integrity,integrity/integrity,dkastner/prism_ci,p/integrity,faradayio/ci1,forresty/integrity,erik-escobedo/integrity,erik-escobedo/integrity,integrity/integrity,factorylabs/integrity,factorylabs/integrity,faradayio/ci1,p/integrity