Added the static energy in the linear program (sometimes called idle energy)
Added improved heuristics.
Added improved heuristic for discrete.

+ added static energy.
Added the static energy into the caml code + modified the script for a new kind of simulations (expe_number 1 is now considering the best results for any number of servers for trees from size 1 to n)
I have cleaned the place where the scripts should be.
For the moment this script can only do one kind of experiments.
Exploitation of the results for the three different kinds of heuristics:

1. according to the number of nodes in the trees
2. according to the static energy
3. according to the total load.