escape arguments to find

Using cloud9's ide with SSH workspace running on OS X 10.8.2 server, the gotofile functionality doesn't work.

After discussing with support.cloud9ide.com, I was pointed to this repo. Trial and error led me to the fix I've committed.

Unfortunately, I'm not familiar enough with node to test this change, but I can confirm that it works with find on OS X.

Any assistance running / adding specs for this will be greatly appreciated.