subset parameter in layers is no longer working with ggplot2 >= 2.0.0
<p>I updated to the newest version of <code>ggplot2</code> and run into problems by printing subsets in a layer.</p>

<pre><code>library(ggplot2)
library(plyr)
df &lt;- data.frame(x=runif(100), y=runif(100))
ggplot(df, aes(x,y)) + geom_point(subset=.(x &gt;= .5))
</code></pre>

<p>These lines of code worked in version <code>1.0.1</code> but not in <code>2.0.0</code>. It throws an error <code>Error: Unknown parameters: subset</code>.</p>

<p>I couldn't find an official change log or a way how to subset specific layers. Specially because this <code>plyr</code> solution was not very nice documented, I think I found it somewhere in stack overflow.</p>