[NEW] h5py and py-pkgconfig

Hello,

I already sent h5py to the list in january, but resending now with py-pkgconfig,which is a BDEP for h5py.

h5py is a requirement for xrayutilities which, I understand, David is or was
working on. bcallah@ also sent out a version in 2015 which never made it into
the tree.

Both ports are python3-only. py-pkgconfig is the python interface to pkgconfig
and might be useful for other ports as well. It comes without tests.

h5py test results look good:
522 passed, 24 skipped, 3 xfailed, 2 warnings

Comments? OK to import?

-m