Changes since v1.0:

* Fix slicing for AtomicStructureAdapter and derived classes.
* Adjust for new default rmax.
* Use direct access to numpy arrays for Atom attributes.
* Improve conversion from diffpy.Structure.
* Use single definition for the bvparmYYYY.cif string.
* Improve representation for blank BVParam().
* Export all wrapped ScatteringFactorTable classes.
* Improve wrappers for the ticker() method.
* Register CovalentRadiiTable on import of overlapcalculator.
* Fix bug in dimensions check.
* Run egg_info when git commit changes.
* Improve version handling for git and tar-based installations.
* Implicitly convert of StructureAdapterPtr to its const type.
* Add get_libdiffpy_version_info function.
* Support OPTIMIZED calculation in Python-derived classes.
* Format post-release versions as per PEP 440.
* Add read-only property PDFCalculator.qstep.