LUN-1110 Use a string instead of json for src attribute of image element
LUN-1110 Add tests for processors. Make sure entries['image'] is a basestring.
Removed duplicated file
Rename a fixture to xml file
Don't process anything in case the feed is invalida (None)
LUN-1110 All tests are passing. Add a test for the case of invalid feed.
Merge pull request #5 from pbs/LUN-1110

LUN-1110 Images doesn't appear for feeds with itunnes namespace