Display spice fail errors

Solves our issue of serp hanging in limbo, on a failed spice call. So now on error we redirect to root page, for e.g. bad hostname error SS:
![ddgredirect](https://cloud.githubusercontent.com/assets/1424236/4702074/a4777832-585f-11e4-8ed6-1a488bf9f577.png)

hmm the domain isn't always 127.0.0.1, for example when using Codio the domain is a random name based on your Codio machine, e.g. "http://teresa-misted.codio.io:5000/".