DOC: Update changelog

Author: effigies

doc/changelog/1.X.X-changelog

@@ -1,10 +1,14 @@
 1.1.6 (November 26, 2018)
 =========================
 
+##### [Full changelog](https://github.com/nipy/nipype/milestone/27?closed=1)
+
   * [FIX] MapNodes fail when ``MultiProcPlugin`` passed by instance (https://github.com/nipy/nipype/pull/2786)
   * [FIX] --fineTune arguments order for MeshFix command (https://github.com/nipy/nipype/pull/2780)
   * [ENH] Add mp_context plugin arg for MultiProc (https://github.com/nipy/nipype/pull/2778)
   * [ENH] Create a crashfile even if 'stop_on_first_crash' is set (https://github.com/nipy/nipype/pull/2774)
+  * [ENH] Add ExtractedBrainN4 output to ANTs CorticalThickness interface (https://github.com/nipy/nipype/pull/2784)
+  * [STY] Combine split import (https://github.com/nipy/nipype/pull/2801)
   * [DOC] use https in css stylesheet url (https://github.com/nipy/nipype/pull/2779)
   * [MAINT] Outsource ``get_filecopy_info()`` from interfaces (https://github.com/nipy/nipype/pull/2798)
   * [MAINT] Import only Sequence to avoid DeprecationWarning (https://github.com/nipy/nipype/pull/2793)