updating tests, include examples in docu

examples/module_cpp_filler.cpp

@@ -0,0 +1,26 @@
+// Copyright 2015-2016 Hans Dembinski
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/python.hpp>
+#include <boost/histogram.hpp>
+#include <boost/random/mersenne_twister.hpp>
+#include <boost/random/normal_distribution.hpp>
+
+namespace br = boost::random;
+namespace bh = boost::histogram;
+namespace bp = boost::python;
+
+void process(bh::histogram<bh::Dynamic, bh::builtin_axes>& h) {
+  br::mt19937 gen;
+  br::normal_distribution<> norm;
+  // fill histogram
+  for (int i = 0; i < 1000; ++i)
+      h.fill(norm(gen), norm(gen));
+}
+
+BOOST_PYTHON_MODULE(cpp_filler) {
+  bp::def("process", process);
+}