Ability to point to some additional subdirectories while resolving file paths

[shabunc]

Sorry if I'm bothering you in vain and if such functionality already exists, but quick glance at code still had not dispelled my doubts on whether this issue relevants or not.

I'm requesting for something like env = Sprockets::Environment.new; env.append_path SOME_PATH. With such feature it would be possible to keep files common to different projects in some common folder, quite a common thing actually for any kind of dependency resolving tools.