Add VCR to development dependiences
Use VCR in integration tests
Peddler::Request::Parameters#action_name
Peddler::Request::StructuredList: add support for SellerSKUList
Peddler::Request::Parameters#format_structured_lists!: add skip option
MWS::Products::Request::OfferListings
ParserHelper#fixture_from_cassette
MWS::Products::Parsers::OfferListings
Correct test name
Truly correct test name
MWS::Products::Parser::OfferListings: fixing test
MWS::Products::Parsers::Product
MWS::Products::Parsers::Identifiers
MWS::Products::Parsers::LowestOfferListings
MWS::Products::Parsers::Product#lowest_offer_listings
MWS::Products::Parsers::LowestOfferListing
MWS::Products::Parsers::Qualifiers
MWS::Products::Parsers::LowestOfferListing#qualifiers
Peddler::Parsers::XML#symbol_to_xpath
MWS::Products::Parsers::Qualifiers: use symbol_to_xpath