Pass the resource URL to the resourceError handler.

http://code.google.com/p/phantomjs/issues/detail?id=997
Add rendering to stdout and stderr.
This feature renders PDF, GIF and other format supported by Qt to
stdout or stderr.

*NOTE*
"/dev/stdout" and "/dev/stderr" are converted to System::stdout and
System::stderr on Windows.

Issue: https://code.google.com/p/phantomjs/issues/detail?id=973