• Bugfix release
• Make inference of data type more robust to changes in numpy dtype hashing
• Fix incorrect thresholds in quaternion calculation (thanks to Yarik H for
  pointing this one out)
• Make parrec2nii pass over errors more gracefully
• More explicit checks for missing or None field in trackvis and other
  classes - thanks to Marc-Alexandre Cote
• Make logging and error level work as expected - thanks to Yarik H
• Loading an image does not change qform or sform - thanks to Yarik H
• Allow 0 for nifti scaling as for spec - thanks to Yarik H
• nifti1.save now correctly saves single or pair images