slideshow-sdl2-v1.3.32bit

• corrected freefile variable type to long
  integer causes issues when opening multiple
  file in succession
• corrected weekday now attained via dateserial
  see: https://www.timeanddate.com/calendar/days/first-day-of-the-week.html
• trimmed utilfile.bas
• reworked shuffleplay...again... should now
  work as intended; only play a item in the set once
  untill the set is exhausted.
• added dutch (nl) as locale
• tidy up conf.ini