LC1 file format

4 bytes: Magic (LC1Y)
1 byte: version
(now repeat to the end of file)
  2 byte: number of following text bytes "n"
  n byte: name of frame
  2 byte: frame delay
  2 byte: morph time
  2 byte: effect type id
  2 byte: effect parameter (since version 4)
  1 byte: effect rotation center x (since version 5)
  1 byte: effect rotation center y (since version 5)
  1 byte: effect auxiliary center x (since version 6)
  1 byte: effect auxiliary center y (since version 6)
  2 byte: control bits (since version 2)
  2 byte: number of following text bytes "n"
  n byte: name of background image
  2 byte: number of following x axis help lines "n" (since version 3)
  n byte: help line offsets (since version 3)
  2 byte: number of following y axis help lines "n" (since version 3)
  n byte: help line offsets (since version 3)
  2 byte: number of following free help lines "n" (since version 3)
    (repeat following block n times)
    1 byte: help line point 1 x coordinate (since version 3)
    1 byte: help line point 1 y coordinate (since version 3)
    1 byte: help line point 2 x coordinate (since version 3)
    1 byte: help line point 2 y coordinate (since version 3)
  2 byte: number of points "n"
  (repeat following block n times)
    5 byte: name of point
    1 byte: x coordinate
    1 byte: y coordinate
    2 byte: currently unused
    2 byte: bits (since version 2)
  2 byte: some currently unclear mx
  2 byte: some currently unclear my