Is there an easy way to precompile all installed packages, e.g. after a `Pkg.update()`?
This would come in handy when using a cluster of Julia machines (using an shared home dir on a network filesystem), to ensure precompilation is done before all machines load (and start precompiling) packages (e.g. from a shared home directory via a network filesystem). Also, as precompilation of many packages can take quite a bit of time, it would be nice to be able to choose when it happens (i.e. right now, instead later when I may want to give a tutorial or so ;-) ). Sorry if this is somewhere in the docs, I didn't find anything about it. I'd love to be able to just do `Pkg.update(precompile = true)` or so. Cheers, Oliver
