Added BeanToCsv and CsvToBean code largely unchanged from OpenCSV-2.4.

Also fixed defect in ResultHelperService where an unsigned INT could be
passed in as Type Integer, causing an overflow.  Added the handleLongOrInt
method to ResultSetHelperService.  Test for it passes.
Changed default behavior of CsvWriter to have the escape char be \ (backslash).

Added two of the opencsv integration "tests" into simplecsv as real tests,
rather than just printing to stdout.