Bf/mesh

See merge request fsl/fslpy!132

Enh/bitmap

See merge request fsl/fslpy!130

pass one at a time

copying data if possible, and avoid copydeprecation warnings.

arrays (e.g. RGB data)

Bf/make writeable

See merge request fsl/fslpy!129

Works around older numpy versions

REF: replaced ambiguous exists method with on_disk and defines

See merge request fsl/fslpy!128

ENH: update fslversion call for the future :hash version

See merge request fsl/fslpy!127

Enh atlases

See merge request fsl/fslpy!126

these return 3D images with the binary or probabilistic mask
in a new image.Image with the name set to the label name
and the same NIFTI header as the atlas

makes the output

MNT: post-release verbump

See merge request fsl/fslpy!125