Improved default error handling
Improved default error handling

With 1fdbb1b4774c82490001ae23719f6466af440f51, all that's logged in the console using the `error` method is `[object Object].

This adds a more useful log with the error message, file, line, and column:

![Screenshot](http://i.imgur.com/KxrUUG3.png)

As a bonus, it also adds a “beep”.
reviewninja/node-sass-middleware,HowlingEverett/node-sass-middleware,sass/node-sass-middleware,kenvunz/node-sass-middleware,iMoritz/node-sass-middleware,am11/node-sass-middleware,esthersdev/node-sass-middleware