added Eigen/StdVector include to svd superpose export

The template specialization for std::vector in Eigen/StdVector seems
to change the symbol generated for std::vector<geom::Vec3>, which can
lead to missing symbols in libost_mol_alg during linking or at runtime,
depending on the compiler. Adding the StdVector include also to
python export of svd superpose helps to generate consistent symbols.

modules/mol/alg/pymod/export_svd_superpose.cc

@@ -21,6 +21,7 @@
  * Author Juergen Haas
  */
 #include <boost/python.hpp>
+#include <Eigen/StdVector>
 
 #include <ost/geom/mat4.hh>
 #include <ost/mol/alg/svd_superpose.hh>