I've understood that it's possible to pre-compile stuff into something called userimg.jl, but I'm struggling to find information on *how* to do this.
Primarily, I'd like to compile a few packages I find myself including very often (and never changing), such as Gadfly and DataFrames. I suppose it would be nice to precompile their dependencies as well. How does one do this? Is it documented somewhere? // Tomas
