Changed margin-bottom unit on ".nav--group" to rems
Extended all headings with ".hN"
Deleted _blocklist.scss
Added -alpha suffix to ui-size & transition-duration variables
Added  add list-- prefix to all list modifiers
Adjusted whitespace & formatting of some comments
Added ".active" class as a js variable, added remove/add class functionality & updated toggle comments to be more accurate
Adjusted dummy comment data to be more consistent
Corrected file paths in comments & removed redundant comment
Added active state comments
Added _toggle.scss intro comments
Added bem style modifier class to ".heading-pair"
Set the ".active" class to a var