Added new SparkMAX analog encoder option, fixed 'none' absolute encoder type

swervelib/encoders/PWMDutyCycleEncoderSwerve.java

@@ -1,5 +1,6 @@
 package swervelib.encoders;
 
+import edu.wpi.first.wpilibj.DriverStation;
 import edu.wpi.first.wpilibj.DutyCycleEncoder;
 
 /**
@@ -65,6 +66,18 @@ public class PWMDutyCycleEncoderSwerve extends SwerveAbsoluteEncoder
     return encoder;
   }
 
+  /**
+   * Get the velocity in degrees/sec.
+   *
+   * @return velocity in degrees/sec.
+   */
+  @Override
+  public double getVelocity()
+  {
+    DriverStation.reportWarning("The PWM Duty Cycle encoder may not report accurate velocities!", true);
+    return encoder.get();
+  }
+
   /**
    * Reset the encoder to factory defaults.
    */