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+2004-11-28 Arnaud
+  - Main loop and datastructures of SURF. A cpu resource object is
+    functionnal. Surf can thus be used to create cpu's with variable
+    performance on which you can execute some actions.
+	
+2004-11-15 Martin Quinson
+  - Port to ARM. Simply added the alignment and size descriptions. Should
+    work, but the ARM machines are so slow that I didn't had the opportunity
+    to 'make check' overthere yet.
+
+2004-11-15 Arnaud Legrand
+  - Trace manager now written. It uses a heap structure and is therefore
+    expected to be efficient. It may however be speeded up (particularly
+    when many events occur at the same date) by using red and black
+    trees. One day maybe... 
+  - Max-min linear system solver written. It uses a sparse matrix
+    structure taking advantage of its expected use. Most operations are
+    O(1) and free/calloc are called as few as possible. The computation of
+    the minimum could however be improved by using a red and black tree
+    (again ! ;).
+
+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. :)
+
 2004-10-29 Martin Quinson
   - Introduction of the remote errors. 
     They are the result of a RMI/RPC on the remote machine.