Solve [Issue#26]

**Link Error Report with existing SF bug ticket**
Now with these change linking is possible.

On the Individual report View only a form is given in which user can enter the ticket number.
![screenshot](https://cloud.githubusercontent.com/assets/6269279/3299413/f783c928-f611-11e3-9cbe-5861ef1e759e.png)

Upon submission a comment is posted on the bug ticket.
![screenshot-1](https://cloud.githubusercontent.com/assets/6269279/3299445/5681a7ec-f612-11e3-8a7a-fd6e5716733a.png)

*Currently the name of the commentor is shown as Mohamed Ashraf because of different [credentials](https://github.com/phpmyadmin/error-reporting-server/blob/master/app/Config/oauth.example.php#L29) I have. Kindly put there the credentials of an error-reporting-bot and then it'll be displayed.*