Revert "Update OMPlot"

lochel · lochel · commit 39c668958e64 · 2017-04-01T11:17:44.000+02:00
This reverts commit 2304f77.
diff --git a/OMPlot b/OMPlot
@@ -1 +1 @@
-Subproject commit 6f97c81edb91698a446a77f6a419da4185821ebb
+Subproject commit 6e6f898e306c6a82be230c2cfb9e76397d30d17f
