WTF BUILDFILE
Convert into an npm module, so we can pick up r.js through npm.
Update codemirror to 2.38
-latest r.js got parse errors on old codemirror code we had
Remove shim -- didn't work in optimized page
Add builtin text/plain mode for compatibility with CodeMirror
Update built code for gh-pages
Copy built code to project root for gh-pages