+2004-11-03 Arnaud Legrand
+ - Rename every gras_* function that was in xbt/ to its xbt_
+ counterpart.
+ - Add a heap and a doubly-linked list to xbt
+ - Added a dichotomy to the dictionnaries. make check works as well before
+ so I assume that the patch is correct. I do not know however if things
+ run effectively faster than before now. :)
+