Insert entry in CHANGES for #1085

Author: oesteban

CHANGES

@@ -1,6 +1,8 @@
 Next release
 ============
 
+* ENH: Added interface to simulate DWIs using the multi-tensor model
+       (https://github.com/nipy/nipype/pull/1085)
 * ENH: New interface for FSL fslcpgeom utility (https://github.com/nipy/nipype/pull/1152)
 * FIX: Enable absolute path definitions in DCMStack (https://github.com/nipy/nipype/pull/1089,
        replaced by https://github.com/nipy/nipype/pull/1093)