Add ggplot2 support und bump to v0.2.0

Change-Id: Iee69051bc64fb9fbde55bbea61c7e892ff95229d
diff --git a/man/figures/Readme-Example-2.png b/man/figures/Readme-Example-2.png
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diff --git a/man/figures/Readme-Example-3.png b/man/figures/Readme-Example-3.png
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