Fix buffer order of acceleration and velocity (#279)

This was read in the reverse order from the script. The order used in
the buffer follows the strategy that for splines it is possible to use
velocities while not providing accelerations, hence they are in the
buffer earlier.

Author: urfeex

resources/external_control.urscript

@@ -487,8 +487,8 @@ thread trajectoryThread():
       end
       # MoveJ point
       if raw_point[INDEX_POINT_TYPE] == TRAJECTORY_POINT_JOINT:
-        acceleration = raw_point[7] / MULT_jointstate
-        velocity = raw_point[13] / MULT_jointstate
+        acceleration = raw_point[13] / MULT_jointstate
+        velocity = raw_point[7] / MULT_jointstate
         movej(q, a = acceleration, v = velocity, t = tmptime, r = blend_radius)
 
         # reset old acceleration
@@ -497,8 +497,8 @@ thread trajectoryThread():
 
         # Movel point
       elif raw_point[INDEX_POINT_TYPE] == TRAJECTORY_POINT_CARTESIAN:
-        acceleration = raw_point[7] / MULT_jointstate
-        velocity = raw_point[13] / MULT_jointstate
+        acceleration = raw_point[13] / MULT_jointstate
+        velocity = raw_point[7] / MULT_jointstate
         movel(p[q[0], q[1], q[2], q[3], q[4], q[5]], a = acceleration, v = velocity, t = tmptime, r = blend_radius)
 
         # reset old acceleration