ExploreRobotHead.TTSTest.WriteToSerialSafely Function
Do error checking here so we don't send a servo value out that will break the robot. These threshold values are experimentally determined using VSA. This should be migrated to a config file

Public void WriteToSerialSafely (byte, byte)
  Type Name Description  
    byte servoId    
    byte servoPosition    
  Return Description  
    void