Updated changelog

Before proceeding to submit the PR. Close #661

Author: oesteban

CHANGES

@@ -8,6 +8,9 @@ Next release
 
 * API: 'name' is now a positional argument for Workflow, Node, and MapNode constructors
 
+* ENH: New interfaces: fsl.PrepareFieldmap, fsl.TOPUP, fsl.ApplyTOPUP
+* ENH: New workflows: nipype.workflows.dmri.fsl.epi.[fieldmap_correction&topup_correction]
+
 Release 0.8.0 (May 8, 2013)
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