Adds modification of datastreams
Adds Qucosa XML update
Refactor URN generation
Adds URN re-generation after deleting it
Fix document update
Centralize DOM serialization
Fix document update (2)
Enable modifying Fedora Object metadata
Update object label when TitleMain or PersonAuthor changes
Update object state when ServerState changes
Avoid adding empty nodes when update
Update DC datastream
Merge branch 'feature-put-document'

TODO: File handling