revert jsdom to working version

the new html parser introduced by jsdom in 0.6.0
https://github.com/tmpvar/jsdom/commit/0d89bf5b6b2c5aecd4477392eba2b6175f942fa1
seems to have broken our csl_nodejs_jsdom, presumably by behaving better and
breaking some of our workarounds. For now we'll just include the last version
of jsdom that worked in node_modules and set the required versiont to that
range in package.json