Emit addition recess error information when error occurs.

This commit lets us do fun things like this gist: https://gist.github.com/shellscape/d60b941e78736c3ccd82 when an error occurs. 

The ```fileName``` property was being lost when PluginError was instantiated. (PluginError's constructors are problematic and inconsistent, I've opened an issue with gulp-util about it). So I'm manually attaching it to the instance to ensure that it's not lost.
Nice catch on the fileName. That's fair, I'll get on that later today and follow up with an issue on gulp-util later on today. I appreciate the willingness to go a little sideways on this one.