added random reddit url maker and phrasing detector

I couldn't get Reddit to redirect me to random urls so I am just returning the random url

Usage:

```
Hubot> hubot r random
Hubot> http://reddit.com/r/random/random
Hubot> hubot r random funny
Hubot> http://reddit.com/r/funny/random
```


Phrasing just looks for certain words or phrases and sends an Archer phrasing gif.