Changes

Marks a story as favorite for some user in DB scripts
This comes in handy for testing that deletions are cascaded properly, 
and might also be useful for designing views and other features.

tsk42 Adds story delete support to EJB
This commit adds a method to delete stories to the corresponding EJB. 
This method requires that the user is authenticated and has the default 
USER role. Only stories made by the logged in user can be deleted.
Unit tests were added for this method, too. Two new Arquillian datasets 
were also added to check that the story deletion test changes the 
database state as expected, and dependent entities are handled 
appropriately.