nipy/nibabel: 2.3.2

Bug fix release for the 2.3 series. Most work on NiBabel so far has been by Matthew Brett (MB), Michael Hanke (MH) Ben Cipollini (BC), Marc-Alexandre Côté (MC), Chris Markiewicz (CM), Stephan Gerhard (SG), Eric Larson (EL), Yaroslav Halchenko (YOH) and Chris Cheng (CC). References like "pr/298" refer to github pull request numbers. 2.3.2 (Wedmesday 2 January 2019) Enhancements Enable toggling crosshair with Ctrl-x in OrthoSlicer3D viewer (pr/701) (Miguel Estevan Moreno, reviewed by CM) Bug fixes Read .PAR files corresponding to ADC maps (pr/685) (Gregory R. Lee, reviewed by CM) Increase maximum number of items read from Siemens CSA format (Igor Solovey, reviewed by CM, MB) Check boolean dtypes with numpy.issubdtype(..., np.bool_) (pr/707) (Jon Haitz Legarreta Gorroño, reviewed by CM) Maintenance Fix small typos in parrec2nii help text (pr/682) (Thomas Roos, reviewed by MB) Remove deprecated calls to numpy.asscalar (pr/686) (CM, reviewed by Gregory R. Lee) Update QA directives to accommodate Flake8 3.6 (pr/695) (CM) Update DOI links to use https://doi.org (pr/703) (Katrin Leinweber, reviewed by CM) Remove deprecated calls to numpy.fromstring (pr/700) (Ariel Rokem, reviewed by CM, MB) Drop distutils support, require bz2file for Python 2.7 (pr/700) (CM, reviewed by MB) Replace mutable bytes hack, disabled in numpy pre-release, with bytearray/readinto strategy (pr/700) (Ariel Rokem, CM, reviewed by CM, MB) API changes and deprecations Add Opener.readinto method to read file contents into pre-allocated buffers (pr/700) (Ariel Rokem, reviewed by CM, MB