Add desnorse command

### What is the problem / feature ?

Snorse is a one-way street

### How did it get fixed / implemented ?

Added the ability to `desnorse`!

### How can someone test / see it ?

```bash
$ desnorse <snowman-text>
```


*Here is a cute baby animal picture for your troubles...*

![christmas-cats](https://cloud.githubusercontent.com/assets/824194/5292386/60961646-7b1e-11e4-93b3-aa9f7089c0ab.jpg)