Mark and Space parity for Serial
While not needed by most, but I found a use for the Mark and Space parity
on the Serial port.

Inserted into the constructor:
...
if (iparity == 'M') parity = SerialPort.PARITY_MARK;
if (iparity == 'S') parity = SerialPort.PARITY_SPACE;
...

and added:
/**
* Set parity, including Mark or Space.
*/
public void setParity(char parit) {

parity = SerialPort.PARITY_NONE;
if (parit== 'E') parity = SerialPort.PARITY_EVEN;
if (parit== 'O') parity = SerialPort.PARITY_ODD;
if (parit== 'M') parity = SerialPort.PARITY_MARK;
if (parit== 'S') parity = SerialPort.PARITY_SPACE;

try {sp.port.setSerialPortParams(rate, databits, stopbits, parity);}
catch (UnsupportedCommOperationException ex) {ex.printStackTrace();}
}

edit]
Serial.java

Noted, thanks.

for sake of simplicity, i think we'll leave it out for now. it's a simple
fix for anyone who needs to make their own version of Serial.java, so i
think we'll leave it at that. thanks!