All the template organization has been refactorized.

Before :
FOctree< ClassParticle, ClassVector, etc...> myTree;
And in the FOctree class the code did some stuff automatically as:
putting ClassVector and ClassParticle together => ClassVector<ClassParticle>
But it must the user the give a ClassVector with the type ClassVector<template class T>

Now :
We decide everything :
FOctree< ClassParticle, ClassVector<ClassParticle>, etc... >
So the code is more generic but it must the user to describe with more
details his data in his main.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/scalfmm/scalfmm/trunk@135 2616d619-271b-44dc-8df4-d4a8f33a7222