+ Moved ee_get_key() here.
  * libee/math.c:
    + Moved r00t() here and renamed it to ee_sqrt().
    + Moved GET_RAND() here and renamed it to ee_rand().
  * src/math.c:
    + Removed this deprecated file.

+ First file in libee, from src/graphics.c.
    + Disable cursor upon initialisation.
    + Added delay code for constant framerate.
  * src/common.h:
    + Minor compilation fix for latest ncurses.

* application: pause box

* the bomb is now part of the standard fire button effect.
  * overlay for life and special weapon jauges.

* fixed an overflow in the tunnel update code.
  * fragbomb is now 'f', not 'd'.
  * added a missing call to init_bonus().

* two new types of aliens. only one rules.
  * removed gfx_write in favor of gfx_putchar and gfx_putstr.
  * added bonuses at alien death. they do nothing yet.
  * seeker missiles. 'b' to test.
  * weapon resolution is now 16*char. needs to be generalized.
  * fixed the supernova bugs. center could collide with the tunnel, and
    the last frame was badly displayed.
  * lots of cleanups everywhere.