+ Made sprite loading more robust.
  * src/explosions.c:
    + No longer use ee_putchar etc. to draw our sprites, but use
      ee_draw_sprite().
  * data/:
    + Drew explosion_medium and explosion_small sprites.


git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/ttyvaders/trunk@140 92316355-f0b4-4df1-b90c-862c8a59935f