preview of emoticons

![qtox-emot](https://cloud.githubusercontent.com/assets/2544251/4597889/e9cf8154-50b2-11e4-8dab-b308bb532227.png)

I think this should be something like

```
for(int i = 0; i < emoticons.size(); i++)
    smiles.push_back(emoticons.at(i).first());
```

Because you can have multiple keys for the same smiley (like :) :-) 😊)