2000-02-25  Jukka-Pekka Iivonen  <iivonen@iki.fi>

	* src/mathfunc.[ch]: Implemented Branch-And-Bound algorithm for
	integer programming.

	* src/solver-lp.c (count_dimensions): Wrote.
	(make_solver_arrays): Wrote.
	(make_int_array): Wrote.
	(solver_branch_and_bound): Wrote.  Solver can now handle the
	`Int' constraints too.
	(solver_lp): Wrote.

	* src/solver.h: Added prototype.

	* src/dialogs/dialog-solver.c: Related changes.