New spline physics for list fling motion.

    private static final int FLING_MODE = 1;

    private static float DECELERATION_RATE = (float) (Math.log(0.75) / Math.log(0.9));

    private static float ALPHA = 400; // pixels / seconds

    private static float ALPHA = 800; // pixels / seconds

    private static float START_TENSION = 0.4f; // Tension at start: (0.4 * total T, 1.0 * Distance)

    private static float END_TENSION = 1.0f - START_TENSION;

    private static final int NB_SAMPLES = 100;

    private static final float[] SPLINE = new float[NB_SAMPLES + 1];

    private float mDeceleration;

    private final float mPpi;