[Console] Added a new helper for choice questions

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

This PR adds a new helper for asking choice questions, which is more user-friendly than the current one. It works only if `stty` is available to be able to read the pressed keys.

### Single choice question

![single](https://cloud.githubusercontent.com/assets/1586668/3487265/18c756aa-0471-11e4-8b5e-02de3219e55f.png)

You can move up and down with the arrow keys. 
To validate your choice press `enter`.

### Multi choice question
![multi](https://cloud.githubusercontent.com/assets/1586668/3487191/3385a27c-046b-11e4-8adb-c2e359b9fc5a.png)

You can move up and down with the arrow keys. 
To select / deselect a choice press the `spacebar`. 
To validate your choices press `enter`.

Todos:

- [ ] Finish tests
- [ ] Documentation
Yes this is a good idea. That's what I did with the `Keyboard` class so it's also available to the developers.