Modify sample codes at README.md
Modify sample codes at README.md

ssidelnikov/SwiftCSV,wrightak/SwiftCSV,naoty/SwiftCSV,reidmweber/SwiftCSV,victor-fdez/SwiftCSV,ssidelnikov/SwiftCSV,victor-fdez/SwiftCSV,naoty/SwiftCSV,reidmweber/SwiftCSV,planetexpress69/SwiftCSV,thecb4/SwifterCSV,planetexpress69/SwiftCSV,wrightak/SwiftCSV,thecb4/SwifterCSV