added ProbTrackX2 to fsl __init__.py

Author: JensNRAD

nipype/interfaces/fsl/__init__.py

@@ -21,9 +21,9 @@
 from .epi import (PrepareFieldmap, TOPUP, ApplyTOPUP, Eddy, EPIDeWarp,
                   SigLoss, EddyCorrect)
 
-from .dti import (BEDPOSTX, DTIFit, ProbTrackX, VecReg, ProjThresh,
-                  FindTheBiggest, DistanceMap, TractSkeleton, XFibres,
-                  MakeDyadicVectors)
+from .dti import (BEDPOSTX, DTIFit, ProbTrackX, ProbTrackX2,
+                  VecReg, ProjThresh, FindTheBiggest, DistanceMap,
+                  TractSkeleton, XFibres, MakeDyadicVectors)
 from .maths import (ChangeDataType, Threshold, MeanImage, ApplyMask,
                     IsotropicSmooth, TemporalFilter, DilateImage, ErodeImage,
                     SpatialFilter, UnaryMaths, BinaryMaths, MultiImageMaths)