[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
Actually, ``@api`` shoulmd never be added in a PR submitting the code. you cannot make it part of the stable API if it is not even part of the codebase.
We will mark it as part of the stable API only a bit later