reconstruction displayed
show image of the fit using the x y parameters from the gui
start to implement code to handle multiple images.
the datatype pic contains a cairo surface and offset x y coordinates
dump all the fiber mode images into a file on the harddrive (this is quite slow, perhaps so slow, that it is better to recalculate every time)
loading the fields from usb2 key takes 14s:
  14.214 seconds of real time
  1.048000 seconds of total run time (0.028000 user, 1.020000 system)
  [ Run times consist of 0.040 seconds GC time, and 1.008 seconds non-GC time. ]
  7.37% CPU
  34,029,581,231 processor cycles
  722,763,792 bytes consed
save-fields.. and load-fields... doesn't work. it only reads the first number.
i guess i shouldn't assume the data to be stored in the right sequence within the pointer given back by vector-sap if it originally was a multi-dimensional array
i broke compilation of step-waveguide.lisp