* Change simulator to use discrete tasks.
   Each task must then be iterated a minimum of times.
   At least two strategies to balance the tasks:
    (i) send the tasks that have the most count of iterations;
   (ii) send the tasks that have the least count of iterations.

* Remove usage of opt::option_x in loba_besteffort.cpp and loba_2besteffort.cpp
   Use -k instead (done).  Remove hack marked "FIXME" in opt::parse_args().

* Support heterogeneous platforms?
   Not sure yet.
   Should be doable if each process also sends its speed to its neighbors.

* Add options -j/-J: minimum number of iterations?

* Add options -f/-F: termination based on flops achieved?

* Choose a license before making the code public.
   CeCILL-B?

* Translate french parts in english (README, QUESTIONS, ALGORITHMS, ...)
   Not urgent.

* Add synchronized mode?
   No.

* Add a variant to (not) change neighbor load information at send?
   No.