Add sabertooth lib, start enabling all motor drive

lib/Sabertooth/examples/2.Settings/Persistent/Deadband/Deadband.ino

@@ -0,0 +1,33 @@
+// Set Deadband Sample for Packet Serial
+// Copyright (c) 2012 Dimension Engineering LLC
+// See license.txt for license details.
+
+// WARNING: This sample makes changes that will persist between restarts AND in all modes.
+#include <Sabertooth.h>
+
+Sabertooth ST(128);
+
+void setup()
+{
+  SabertoothTXPinSerial.begin(9600);
+  ST.autobaud();
+  
+  // This makes the deadband from -20 to 20 (of 127).
+  // If your commands for a motor stay entirely within the deadband for more than
+  // a second, the motor driver will stop the motor.
+  // WARNING: The Sabertooth remembers this command between restarts AND in all modes.
+  // To change your Sabertooth back to its default, call ST.setDeadband(0)
+  ST.setDeadband(20);
+}
+
+void loop()
+{
+  // 50 is greater than 20, so the motor moves.
+  ST.motor(1, 50);
+  delay(5000);
+  
+  // 10 is NOT, so the motor does not move.
+  ST.motor(1, 10);
+  delay(5000);
+}
+