Now working with Hungry House.  Need to try and reduce code duplication
before ready to send pull request
Abstract out common functions to a utility library
Use a separate (not inline) function for the food.gov.uk callback.  Still needs
to be tidied up and added to just-eat as well.
Tidying up code and abstracting out API callback function
Merge pull request #2 from lordofthemoon/master

Now working with Hungry House