Use IDS themed ggplot2 example

Change-Id: I3390a048ab9bc2aca84d6bebd07a92cfaa5703bf
diff --git a/man/figures/Readme-Example-1.png b/man/figures/Readme-Example-1.png
index 20d4bdf..cd99a35 100644
--- a/man/figures/Readme-Example-1.png
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