Install packages from npm

[botic]

Even if this might be a non-goal of rp, but I just want to drop this issue in: At the moment we have some npm modules mirrored into our package registry. Some of them require modifications, so this is okay. Others (like rx/rxjs) don't. Is there an easier way to install the latter then taking the indirect route over npm? In case this is a non-goal, it's still okay to use npm imho.