Added tutorial 403 and submodule bbw

Former-commit-id: a475a5d124

python/modules/py_igl_bbw.cpp

@@ -0,0 +1,18 @@
+//#include <Eigen/Geometry>
+//#include <Eigen/Dense>
+//#include <Eigen/Sparse>
+
+
+#include "../python_shared.h"
+
+#include <igl/bbw/bbw.h>
+
+
+void python_export_igl_bbw(py::module &me) {
+
+  py::module m = me.def_submodule(
+    "bbw", "Wrappers for libigl functions that use bbw");
+
+  #include "../py_igl/bbw/py_bbw.cpp"
+
+}

python/modules/py_typedefs.cpp

@@ -1,5 +1,6 @@
 py::class_<RotationList>(m, "RotationList")
     .def(py::init<>())
+    .def(py::init<size_t>())
     .def("pop_back", &RotationList::pop_back)
     /* There are multiple versions of push_back(), etc. Select the right ones. */
     .def("append", (void (RotationList::*)(const Eigen::Quaterniond &)) &RotationList::push_back)