Work in a clean git clone without codemirror
Put codemirror in the master branch as well

People having problems using js-beautifier checkout locally.

If anyone's willing to update CodeMirror to a recent version, they're
most welcome.

I'm not using git externals, as they seem to bork the github page
generation silently and completely, if used under gh-pages branch (which
is exactly what I'd need) (an up-to-date copy, not a silent complete
bork, that is).
Make beautifer strict-safe, fixes #166
Fix a weird typo
Fix strings starting after a comment (+fix #167)
Ignore some stuff.
Rhinoify up in this piece.