initial set of changes introducing python3 support

Code/DataStructs/Wrap/DataStructs.cpp

@@ -18,7 +18,8 @@
 #include <boost/python/numeric.hpp>
 #include <numpy/npy_common.h>
 #include <numpy/arrayobject.h>
-
+#include <RDBoost/import_array.h>
+#include <RDBoost/pyint_api.h>
 
 namespace python = boost::python;
 
@@ -52,7 +53,7 @@ void convertToNumpyArray(const T &v,python::object destArray){
 
 BOOST_PYTHON_MODULE(cDataStructs)
 {
-  import_array();
+  rdkit_import_array();
   python::scope().attr("__doc__") =
     "Module containing an assortment of functionality for basic data structures.\n"
     "\n"