New since 4.4.6

New function ReadCifWithError may be used instead of ReadCif. It will not raise an Exception on a parse error, instead returning the partially populated CIF object and parse information.
Similar to the above, when the CifFile constructor is called with new option 'allow_partial = True', parsing information is available by calling the get_parsing_result method on the returned CifFile object instead of raising an exception (thanks to Inigo Gabirondo
for work on these two items).
Dictionary merging and validation has been improved (Inigo Gabirondo)
A helpful convert_to_canonical method is provided for CifFile objects. When called with a dictionary, data names are converted to canonical form (Inigo Gabirondo).
Previously deprecated methods and classes are now gone: AddCifItem, AddToLoop, and ValidCifFile

Developer-visible changes

From version 5.0.0 noweb files (*.nw) for source have been removed. It was too much of a barrier for Windows-based developers to contribute. The .py files are now the canonical source, with the original literate programming sections converted to python comments.