add more statistics

[lkeegan]

• Overall time to finish
  a sequence/trial and block
• Number of correct and incorrect sequences/trials (correct trial = correct target was reached
  within the given time; incorrect trial = wrong target was reached or target was not reached
  within the given time)
• Display option for calculating outcome parameters separately for correct sequences/trials
  and block and incorrect trials (e.g. sequence/trial and block average performance is
  calculated for correct and incorrect sequences/trials separately)
• When the participant is required to move cursor back to the central target: display option
  for overall movement time, movement distance, and RMSE (i.e. movement to target and back to
  center target)
• Initial directional error: calculated as the difference between the ideal trajectory,
  (vector between the center point to the target), and the real trajectory (vector between the
  center point to the trajectory point) at a given time (e.g. 80 ms) after the movement onset.
  If possible the time after movement onset can be specified in the settings.

[lkeegan]

• movement time parameter (e.g. overall movement time) defined as the time
  between target appearance until the target is reached?