+ Doxygenated a few things.

to examples/.

+ Correct clipping in ee_putstr() for long strings.
  * libee/ee.c:
    + New ee_get_rendertime() call to provide framerate information.
  * libee/ee.h:
    + Added const keywords where it was meaningful, despite Slang's blatant
      omission of such keywords in its prototypes.

+ Added ee_color_names[] containing our 16 color names.
  * libee/ee.c:
    + Extended our color set to the full 16 instead of 10.
    + Precalculate ncurses attributes.
  * libee/graphics.c:
    + Clip color value in ee_set_color().
    + Clip characters in ee_putchar().
    + Partially clip characters in ee_putstr(), overflows aren't checked yet.
  * libee/ee_internals.h:
    + New file to share extern variables within libee.

  * test/demo.c:
    + Added a simple demo_color() to output all colors.
    + Replaced four ee_draw_line() with ee_draw_thin_box().
    + Replaced x1, y1, x2 etc. with xa, ya, xb etc. because <math.h> already
      defines y1.
    + Randomized colours from 0 to 15 instead of 1 to 10.

  * src/Makefiles.am:
    + Added -lm to the ttyvaders linking flags because of the intro.

  * README BUGS TODO:
    + Updated.

+ Renamed ee_color() to ee_set_color(), wrote ee_get_color().
  * libee/line.c:
    + Implemented draw_polyline() and draw_thin_polyline().
  * libee/sprite.c:
    + Removed the f member of struct ee_sprite.
    + Implemented ee_get_sprite_{width|height|dx|dy}().
    + Restore the color fater ee_draw_sprite() is called.
  * libee/box.c:
    + Fixed a bug causing improper box clipping at the right and the bottom.
  * data/foo_fighter:
    + Fixed bugs in the sprite.
  * src/intro.c:
    + Test effects for the future game's intro.
  * test/spritedit.c:
    + Added stuff to the sprite editor. We can now navigate through frames.

+ Moved ee_putstr() and ee_putchar() in here.
  * libee/ee.h:
    + Got rid of ee_goto().
    + Moved <slang.h> or <curses.h> into libee.
  * Replaced ee_goto()/ee_putstr() pairs with ee_putstr().
  * Ditto for ee_putchar().

+ Added code comments.

+ ee_draw_thin_line().
  * test/demo.c:
    + Added a thin lines demo.

+ Removed draw_circle, use ee_draw_circle instead.
  * libee/circle.c:
    + New ee_draw_circle function.
  * libee/line.c:
    + Changed an internal function's name.