[CSV-130] CSVFormat#withHeader doesn't work well with #printComment, add withHeaderComments(String...)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1623984 13f79535-47bb-0310-9956-ffa450edef68
[CSV-130] CSVFormat#withHeader doesn't work well with #printComment, add withHeaderComments(String...). Adjust test for style.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1623985 13f79535-47bb-0310-9956-ffa450edef68
[CSV-130] CSVFormat#withHeader doesn't work well with #printComment, add withHeaderComments(String...). Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1623987 13f79535-47bb-0310-9956-ffa450edef68