Bug-fix release in the 0.8.x series.

All releases since 0.5.3 have incorrectly resampled the (aparc+)aseg
segmentations with trilinear interpolation, rather than nearest-neighbor.
This fix has also been applied in 0.7.2,
to provide a fix in the fMRIPrep LTS series.

  * FIX: Resample aseg with nearest-neighbor interpolation (#268)