add vbm segment to __init__

Author: bpinsard

nipype/interfaces/spm/__init__.py

@@ -6,7 +6,7 @@
                    scans_for_fnames)
 from .preprocess import (SliceTiming, Realign, Coregister, Normalize, Segment,
                          Smooth, NewSegment, DARTEL, DARTELNorm2MNI,
-                         CreateWarped)
+                         CreateWarped, VBMSegment)
 from .model import (Level1Design, EstimateModel, EstimateContrast, Threshold,
                     OneSampleTTestDesign, TwoSampleTTestDesign,
                     PairedTTestDesign, MultipleRegressionDesign)