Add multi-Binomial distrib operators in EDO

So as to model vector<vector<bool>> individuals with 2D binomial distributions (as Eigen matrix).

edo/src/edoBinomialMulti.h

@@ -0,0 +1,59 @@
+/*
+The Evolving Distribution Objects framework (EDO) is a template-based,
+ANSI-C++ evolutionary computation library which helps you to write your
+own estimation of distribution algorithms.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Copyright (C) 2013 Thales group
+*/
+/*
+Authors:
+    Johann Dréo <johann.dreo@thalesgroup.com>
+*/
+
+#ifndef _edoBinomialMulti_h
+#define _edoBinomialMulti_h
+
+#include "edoBinomial.h"
+
+#ifdef WITH_EIGEN // FIXME: provide an uBLAS implementation
+#include <Eigen/Dense>
+
+/** A 2D binomial distribution modeled as a matrix.
+ *
+ * i.e. a container of binomial distribution.
+ *
+ * @ingroup Distributions
+ * @ingroup Binomial
+ */
+template<class EOT, class T=Eigen::MatrixXd>
+class edoBinomialMulti : public edoDistrib<EOT>, public T
+{
+public:
+    /** This constructor takes an initial matrix of probabilities.
+     *  Use it if you have prior knowledge.
+     */
+    edoBinomialMulti( T initial_probas )
+        : T(initial_probas) {}
+
+    /** Constructor without any assumption.
+     */
+    edoBinomialMulti() {}
+};
+
+#endif // WITH_EIGEN
+#endif // !_edoBinomialMulti_h
+