Adding CSS parser via https://github.com/adobe-webplatform/css-regions-polyfill
Adding domReady method via https://github.com/ded/domready
After the parsing engine has loaded and parsed rules, they go here. Rules are then sorted, filtered to return only relevant flex values, and finally grouped based on parent/child relationships.
Bridge domReady / init / parser.
Cleanup source order and format.
Tweak whitespace.
Generated changes.
Merge branch 'feature/css-parser' into develop
Adding step to initialize submodule.