get_app_package() and get_containing_app_data() fixes for django 1.6
get_app_package() and get_containing_app_data() fixes for django 1.6

If process models are located in a models module that consists of multiple files
(./models/processes.py), aforementioned functions cannot resolve the package.

ribeiro-ucl/viewflow,pombredanne/viewflow,ribeiro-ucl/viewflow,viewflow/viewflow,viewflow/viewflow,ribeiro-ucl/viewflow,pombredanne/viewflow,viewflow/viewflow