Modify mappings for USC, fix a bug where pres masters were in ListRecords.
Add date parsing for USC's case.
Functionalize.
Merge pull request #6 from adam-vessey/7.x-USC-21

Functionalize.
Merge pull request #62 from jordandukart/7.x-USC-21

Modify mappings for USC, fix a bug where pres masters were in ListRecord...