py::module_local() missing in bindings

Hey,

Not really a bug but I think a "good practice" when exposing c++ bindings with pybind11.
Could you please mark the binded objects as `py::module_local()`  to avoid symbol conflicts with other library.

Example:

`py::class_<libCZI::IntRect>(m, "BBox")` ---> `py::class_<libCZI::IntRect>(m, "BBox", py::module_local())`

Best,
 
Daniel