import that from sure.deprecated
allow appnames with dots. ex.: 'apps.myapp'

imp.load_module() does not handle hierarchical module names so
a new method was added to nose runner: 'import_app_module' to
handle it.

note that in order to just find out if the module 'foo.bar' exists
we need to use 'imp.load_module' with 'foo'

for more information see:
http://docs.python.org/2/library/imp.html#imp.find_module