* mln/morpho/tree/data.hh: Add optimization about preorder
	iterator.
	* tests/morpho/tree/data.cc: Update test file.

	* sandbox/edwin/tree/accumulator/arg_max.hh: New accumulator
	that returns site having the max value.
	* sandbox/edwin/tree/accumulator/max.hh: Remove.
	* sandbox/edwin/tree/propagate.hh: Make clean.
	* sandbox/edwin/tree/propagate_if.hh: Functions performing
	different propagations on nodes matching a predicate.
	* sandbox/edwin/tree/propagate_node.hh: Basic ascendant and
	descendant propagations computation.
	* sandbox/edwin/tree/propagation.cc: Test file for propagations.
	* sandbox/edwin/tree/routines.hh: Remove.
	* sandbox/edwin/tree/run.hh: Methods to apply accumulator on
	tree nodes, and to perform object component research with a
	criteria (treshold...).
	* sandbox/edwin/tree/test.cc: New.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3552 4aad255d-cdde-0310-9447-f3009e2ae8c0