New features:
- #708830: add hooks for alter and save on retrieved nodes by joachim: Added hooks for alter and save on retrieved nodes; split out filefield handling to separate module; split out core node properties handling to an inc file.
modules now implement API keys as well as session IDs in service calls for increased security.
multiple bug fixes in the distribution / retriever modules
admin interfaces tidied / improved usability on admin pages
added readme.txt base documentation on how to initially set-up and configure the modules