The switch to Babel broke packaging extensions that made use of LessCSS

include paths that didn't prefix included files with /static/ (which

basically means anything including reviews.less and some other files).

This was due to the include path generation code ensuring that each

staticfiles entry contained the parent directory of the static/, which

isn't quite correct anymore.
We now include the static/ directory and its parent, ensuring that

both new-style includes and old-style ones will work properly during

packaging.

Built a package including rb/css/pages/reviews.less. Prior to this fix,

packaging failed. After, it succeeded, referencing the values used in

that file.