Summary of results when testing multiple django apps


When I run test with lettuce, it gives me a summary of results for each app that has associated lettuce feature files.

For example, my `LETTUCE_APPS` variable contains two elements, and when I run tests it looks like this


    $ python manage.py harvest
    
    ...
    
    4 features (4 passed)
    11 scenarios (11 passed)
    120 steps (120 passed)
    (finished within 2 minutes)
    
    ...
    
    3 features (3 passed)
    20 scenarios (20 passed)
    183 steps (183 passed)
    (finished within 7 minutes)


I'd love to see a summary of results at the bottom that would show me the aggregated result numbers across all of the tests. 

    7 features (7 passed)
    31 scenarios (31 passed)
    303 steps (303 passed)