don't be a jerk, don't monkey-patch sass maps
Merge pull request #49 from chriseppstein/master

fewer allocations
Merge remote-tracking branch 'upstream/master'
whitespace cleanup after upstream merge
fixing doc blocks for recently added methods
Merge pull request #50 from eoneill/master

stop abusing Sass maps
first pass at support for derived-style and styleguide-derived-style
typo fix
remove TODO comments from sass_extensions_test
Merge pull request #51 from eoneill/master

first pass at support for derived-style and styleguide-derived-style
adding some doc blocks
more cleanup
derived-styles, fuzzy matching for overflow, animation, margin, padding
derived-styles, fuzzy matching for target, transition
derived styles, fuzzy matching for background
adding placeholders for derived-styles
derived styles, fuzzy matching for list-style
some cleanup for list-style
adding optimization to only output augmented shorthand if it was modified
derived styles, fuzzy matching for outline