Update dependencies.

BS3 commits: 503ec4e5db855eca993304ee05bd4acadf2f03e0
Update uglify-js to v2.4.15.

BS3 commits: e598247bcc1cb231b84a00cf41252c7587eeae32
Run `grunt`.

BS3 commits: 94472ee74ac6732a3abd0d32ad5c3a68370090c0