REF/DOC: Better docstring, more Python attr handling.
REF/DOC: Better docstring, more Python attr handling.

hhslepicka/metadatastore,hhslepicka/metadatastore,arkilic/metadatastore,NSLS-II/metadatastore,arkilic/metadatastore,ericdill/databroker,tacaswell/metadataStore,tacaswell/metadataStore,ericdill/databroker,NSLS-II/metadatastore