Modified MetacatHandler, added createSystemMetadata() - generates SystemMetadata objects for newly inserted data or documents. This is intended to be used from handleInsertOrUpdateAction(), and only for documents being inserted from clients that don't support the DataONE interface. The method parses EML documents to discover data entities, and updates the system metadata for those entries, with support for describes and describedBy metadata. Currently doesn't handle FGDC, etc. documents.
Added sizeOfStream() - Find the size (in bytes) of a stream. Note: This needs to refactored out of MetacatHandler and into a utility when stream i/o in Metacat is evaluated.