Feature/add crud datastream

This branch got a bit manky, sorry about that.  The two changes that made it through the process are as follows: 

1.  update_metadata_from_upload_screen now takes a single parameter, which should be the generic file to be modified.  I felt that this was clearer.  

2.  The batch update job now partially fills out the oaidc datastream.  More work on this to come.