MIT no longer uses this theme for Residential MITx. See https://github.com/mitodl/mitx-theme for the current theme (as of August 2016).
This directory stores Stanford's theming files for its edX instance. We're storing the stuff here and then pulling it in to our instance when we deploy.
We've organized the tree to mimic the directory structure of the edX codebase so that it's easy to tell where the files will end up upon deploy. We'll use a special settings file to set the template and staticfiles paths properly to point to these files.
The proposed theming solution for edX (see this pull for more details) provides a number of hooks for themes to adjust both HTML and CSS to their liking.