Restructured code to allow more granular handling of different rdf:types
Added new objects to handle more rdf:types
Added class to parse MusicAlbum type
Added type mapping, classes and tests for parsing rdf:type Image,
Thesis, MusicAlbum
Added tests and mocks for searching a specific database within WorldCat
Fixed missing umbel namespace needed for Periodical rdf:type
Fixed MusicAlbum getFormat function
Added class, tests, mocks for parsing article data
Added class, tests, typing mapping and mocks for rdf:type thesis
Removed unnecessary test
Added new objects, tests, and mocks to handle more rdf:types