fixed methods for converting to pig strings (they didnt actually work...), added methods for going back to arrays
fixed methods for converting to pig strings (they didnt actually work...), added methods for going back to arrays

infochimps-labs/wukong,infochimps-labs/wukong,infochimps-labs/wukong,infochimps-labs/wukong,infochimps-labs/wukong