- CoefficientField can now represent a generic b-spline coefficient
field. Cleaned up fnirt.py, other tweaks and comments

coefficient field to displacement field. Check for TOPUP intent codes

are fine. Generating a slightly less incorrect (but still incorrect) v2w
affine for the former. Bug in test script

convertDisplacementSpace

nonlinear module. Expand x5 module to handle non-linear. Rename x5 functions
to be more generic.

intent code to be changed. Nifti class emits new "header" notifier topic
when intent changes.

read/write routines

be useful outside of the Nifti class (for testing, at least)

fsl, and world coordinate systems. New getAffine method allows you to get an
affine between any of the coordinate systems

dimensions

a file name. Bitmap.asImage passes dataSource through to Image.__init__

are still shaped (w, h, c), where c == 1

pass one at a time