Changes
- Add correct wrapping for C++-instantiated objects available through global
registries, e.g. when loading an XML file. The objects are decorated with
the python functions when accessed through the global registries GetObj()
- Moved global object registries to pyobjcryst.globals
- Update documentation
Fixed
- Fix access to PRISM_TETRAGONAL_DICAP, PRISM_TRIGONAL,
ICOSAHEDRON and TRIANGLE_PLANE.
- Fix powder pattern plot issues (NaN and update of hkl text with recent
matplotlib versions)