Consider adding default "standard" `CsvSchema` instances

[cowtowncoder]

Since there are couple de-facto "sub-formats" of CSV; for example ones explained here:

http://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.html

it might make sense to add those for convenience. This could also expose gaps in current implementation, i.e. it'd make sense to have more test data to validate use of such variations.

[cowtowncoder]

For completeness, of examples listed, it seems useful to support something like:

• EXCEL_WITH_COMMA
• MYSQL_EXPORT
• RFC4180
• TDF

[jonnyelliot]

It could be implemented in a similar way to the also-excellent Apache Commons CSV: CSVFormat