Changing deletion statement and adding CORS support

Deletion statement returns now the article and http status code 200.

CORS support is added on the server side for cross origin resource
sharing support if an option request was made the headers will be
returned.
Adding timeout for messagebox module

Changing the partials view with click event and moved the message box
to the inner main div col-md-9. however, this triggers a bug with the
first entry on the navigation list.

The bug has to be found and fixed with the next commit