Made separate convience intializer to accept encoding to preserve the signature of original convience initializer.
Made separate convience intializer to accept encoding to preserve the signature of original convience initializer.

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