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)

Hehe I've been planning to change this wording forever. Please replace "plugin" with "Instant Answer" -- we've been avoiding the word "plugin" because it has led to confusion for some people. Everything is just an "instant answer" now... 

*Mwahahahaha!*