add decoder for accel velocity submodules

src/decoders/index.ts

@@ -1,13 +1,17 @@
+import CentroidAccelVelocity from './motion/centroid-accel-velocity';
 import CentroidPosition from './motion/centroid-position';
 import OrientationEuler from './motion/orientation-euler';
 import OrientationQuaternion from './motion/orientation-quaternion';
+import TrackedPointAccelVelocity from './motion/tracked-point-accel-velocity';
 import TrackedPointPosition from './motion/tracked-point-position';
 import RTTrPHeader from './rttrp';
 
 export const Decoders = {
   RTTrPHeader,
   CentroidPosition,
+  CentroidAccelVelocity,
   TrackedPointPosition,
+  TrackedPointAccelVelocity,
   OrientationQuaternion,
   OrientationEuler,
 };