dcjones/Gadfly.jl — pull request #95 by Calder (2013-10-23 06:37:19+00:00)
Title: Added shorthand for function layers.

Allows this usage:
```julia
plot(data("datasets", "iris"),
layer(x="Sepal.Length", y="Sepal.Width", Geom.point),
layer([sin, cos], 0, 25))
```