Deleting redirect documentation/ Adding dynamically generated examples 

Deleted lengthly documentation from Admin/Redirect page, and replaced with a dynamically updated field showing the redirect outcome.
![screen shot 2014-10-20 at 12 15 35 pm](https://cloud.githubusercontent.com/assets/5241140/4707459/dd80ad78-588d-11e4-92ab-d1d96af71d58.png)

The spacing and `-->` should match the result for the prefix redirect, ie:


```Outcome: /$lang/$version/test/foo/--> /$lang/$version/blah/```
vs
```Outcome:test/foo/faq.html -> /$lang/$version/faq.html```