Add additional_matchers to use_cassette
Add additional_matchers to use_cassette

Closes #188.

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