Add ggplot2 support und bump to v0.2.0

Change-Id: Iee69051bc64fb9fbde55bbea61c7e892ff95229d
diff --git a/inst/examples/ex-ggplot.R b/inst/examples/ex-ggplot.R
new file mode 100644
index 0000000..6c349d2
--- /dev/null
+++ b/inst/examples/ex-ggplot.R
@@ -0,0 +1,32 @@
+library(ggplot2)
+library(idsThemeR)
+
+if (interactive()) {
+p <- ggplot(mtcars) + geom_point(aes(x = wt, y = mpg,
+     colour = factor(gear))) + facet_wrap(~am)
+p + theme_ids() + scale_colour_ids()
+p + theme_ids(style = "dark") +
+  scale_colour_ids("dark")
+
+dtemp <- data.frame(Months = factor(rep(substr(month.name, 1, 3), 4),
+                                    levels = substr(month.name, 1, 3)),
+                    City = rep(c("Tokyo", "New York", "Berlin", "London"),
+                               each = 12),
+                    Temperature = c(7.0, 6.9, 9.5, 14.5, 18.2, 21.5,
+                             25.2, 26.5, 23.3, 18.3, 13.9, 9.6,
+                             -0.2, 0.8, 5.7, 11.3, 17.0, 22.0,
+                             24.8, 24.1, 20.1, 14.1, 8.6, 2.5,
+                             -0.9, 0.6, 3.5, 8.4, 13.5, 17.0,
+                             18.6, 17.9, 14.3, 9.0, 3.9, 1.0,
+                             3.9, 4.2, 5.7, 8.5, 11.9, 15.2,
+                             17.0, 16.6, 14.2, 10.3, 6.6, 4.8))
+
+ggplot(dtemp, aes(x = Months, y = Temperature, group = City, color = City)) +
+  geom_line() +
+  geom_point(size = 1.1) +
+  ggtitle("Monthly Average Temperature", subtitle="Source: WorldClimate.com") +
+  theme_ids() +
+  scale_colour_ids()
+
+}
+