ENH: Add a structure for copying the data (only the data) from a Document.
ENH: Add a structure for copying the data (only the data) from a Document.

tacaswell/dataportal,danielballan/dataportal,NSLS-II/dataportal,danielballan/datamuxer,ericdill/datamuxer,NSLS-II/dataportal,danielballan/dataportal,NSLS-II/datamuxer,danielballan/datamuxer,ericdill/databroker,ericdill/datamuxer,tacaswell/dataportal,ericdill/databroker