(fix) Set the times correctly in the AFP feed
fix(setup): update dependencies
fix(ingest): fix celery task de-serialization

SD-700
fix(ingest): add base ingest service class

fetching an item from ingest is calling service to get an updated
version of item. this might not be applicable to some providers
so there is a base class that handles this.

SD-654
Merge pull request #266 from petrjasek/master

fix(ingest): add base ingest service class
spike(services) - introduce services and injected data layer.