Added a new constructor for MARC::Subfields to allow construction with a vector of Subfield.
Added a new constructor for MARC::Subfields to allow construction with a vector of Subfield.

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools