#16 Support for National Character Set Conversion

[David Berry]

Need to come up with a way for a user to be able to use the 'N' jdbc routines like setNClob, setNString, and setNCharacterStream. These methods do the necessary conversion from the Java Character format to the national character set in the database. Currently CPO uses setString and getString when dealing with a String. Need a mechanism for choosing alternate methods, preferably at the column level.

May need to change JavaSqlMethods to look at the java type of a column and not just the java class.