feat(packages) - cleanup schema, use the same field names as reuters
feat(packages) - change residRef format
feat(packages) - fix link update to update only the needed property instead of the whole doc
allow packages without references to be added
feat(packages) - add versioning support
packages - improve logging
Merge branch 'fix-patch' into packages
feat(packages) - check root group references
feat(packages) - validate root group on PATCH.
[SD-1292] Add privileges to Activity resource
[SD-1292] dont require a privilege but check the update in the service
[SD-1292] fix error message
[SD-1292] add behave tests for notification read
rebase with upstream
Merge pull request #451 from superdesk/packages

feat(packages) - update the schema to allow reuters like newsml schema
Merge pull request #456 from marwoodandrew/master

Add privileges to the Activity resource