[skip ci] Update CHANGES - Version 0.5.2
+0.5.2 (December 8, 2018)
+=========================
+
+With thanks to @wiheto for contributions.
+
+ * [ENH] Upstream work from fMRIPrep (prep. sMRIPrep) (#263)
+ * [ENH] Integrate versioneer (#264)
+ * [FIX] X axis label for fMRIPlot - better respect TR and default to frame number (#261)
+
0.5.1 (November 8, 2018)
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