v1.0.3

Available features:

1. kinematic features
   1. velocity
   2. acceleration
   3. jerk
2. dynamic features
   1. azimuth
   2. tilt
   3. pressure
3. spatial features
   1. stroke length
   2. stroke height
   3. stroke width
   4. writing length
   5. writing height
   6. writing width
   7. number of intra-stroke intersections
   8. relative number of intra-stroke intersections
   9. total number of intra-stroke intersections
   10. relative total number of intra-stroke intersections
   11. number of inter-stroke intersections
   12. relative number of inter-stroke intersections
   13. vertical peaks indices
   14. vertical valleys indices
   15. vertical peaks values
   16. vertical valleys values
   17. vertical peaks velocity
   18. vertical valleys velocity
   19. vertical peaks distance
   20. vertical valleys distance
   21. vertical peaks duration
   22. vertical valleys duration
4. temporal features
   1. stroke duration
   2. ratio of stroke durations (on-surface / in-air strokes)
   3. writing duration
   4. writing duration overall
   5. ratio of writing durations (on-surface / in-air writing)
   6. number of interruptions
   7. number of interruptions relative
5. composite features
   1. writing tempo
   2. writing stops
   3. writing number of changes