[#60] Changes about a way for teacher to delete a question during "START_MAKE" status

This post add a confirmation page.
Cancel and back buttons work well for me.

Here is some screenshots: 

### Details of a question ###
![screenshot_2013-12-08-01-08-14](https://f.cloud.github.com/assets/3521208/1710571/864bd6e6-6134-11e3-8512-2e74c9434d12.png)

### Confirmation page ###
![screenshot_2013-12-08-01-08-21](https://f.cloud.github.com/assets/3521208/1710580/bed4f826-6134-11e3-823c-ac60e8713f26.png)


### The step which does not work for now ###
![screenshot_2013-12-08-01-08-26](https://f.cloud.github.com/assets/3521208/1710581/c48a93ac-6134-11e3-8497-af21c2c032b0.png)


But my DELETE request is not accepted by the Smileplug. And I know not why:

* on node side,  the console shows this:

```
Error handling: DELETE /smile/questionview/1.json, Details: 200
```
* on teacher app, this instruction returns '500'

```
httpURLConnection.getResponseCode(); // returns '500'
```

Relative issue: #60