Squashed 'scss/' changes from f6aff04..eeaf2d9

eeaf2d9 update chopstick, fix missing files
af7022b replace master branch with feature--pattern-library

git-subtree-dir: scss
git-subtree-split: eeaf2d93a8d56b998f8a3d08ed0abc5c8e7efcf3
Merge commit 'c369b13bf5871d3522ea6318109fd29883d0bcd8'

* commit 'c369b13bf5871d3522ea6318109fd29883d0bcd8':
  Squashed 'scss/' changes from f6aff04..eeaf2d9
add back _functions and _typography