What to do when you want to replace gfx
==================================================
1) the simple way:
 -put your image in the electron_data/gfx subdir , overwriting the
  image you want to replace ( or replace all images in the
  electron/gfx/anim_name dir if you replace an animation)
 -cd to the electron_data dir and run 'make small' or
  'make large' to create a small or large datafile
 -go make some tea or coffee (especially for make large)
 -copy data.dat and data.h to the electron data dir

2) the fast way
 -put your image in the electron_data/gfx subdir , overwriting the
  image you want to replace ( or replace all images in the
  electron/gfx/anim_name dir if you replace an animation)
 - use the electron_data/utils/scaletrans utility to
  scale your image to the correct tilesize (check your
  datafile) , put the scaled image in a temp dir!!!
  and leave your original in the electron_data/gfx dir
  for future runs of the build script.
 - use the grabber to grab the image into the datafile
 make sure you keep the same names.

What to do when you want to add new gfx
==================================================
 -put your image in the electron_data/gfx subdir, or
  for an animation make a subdir there and put all images in it
  you can use any image format allegro supports,
  even rgba tga files (though from gimp you should not use
  compression, because allegro doesn't understand gimp's
  tga compression) alpha >.5 is considered transparant
 -make sure your image/subdir has the correct name:
   -the subdir should be the name of the object in lowercase
   - the basename of the imagefile should be the object
     (case insensitive!!! don't use 2 objects with the same
       name)
 -for anims add your dir name to the 'anims' file
  and for sprites add it to the 'sprites' file
 - run the 'make small' or 'make large' commands
