Change CSVFormat#Iterable<CSVRecord> parse(final Reader in) to return a CSVParser, which is compatible since CSVParser implements Iterable<CSVRecord>. This allows a caller to end the parsing by calling CSVParser#close() or to use CSVParser in a Java 7 try-with-resources, without tracking a reader or input stream.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1508509 13f79535-47bb-0310-9956-ffa450edef68