Add tests for explicitly specifying a path when library dir is defined
Add tests for explicitly specifying a path when library dir is defined

aclevy/vcrpy,mgeisler/vcrpy,gwillem/vcrpy,ByteInternet/vcrpy,yarikoptic/vcrpy,graingert/vcrpy,kevin1024/vcrpy,IvanMalison/vcrpy,graingert/vcrpy,agriffis/vcrpy,ByteInternet/vcrpy,bcen/vcrpy,kevin1024/vcrpy,poussik/vcrpy,poussik/vcrpy