ImageEngine/gaffer — pull request #725 by johnhaddon (2014-01-27 11:30:38+00:00)
Title: Path filter plug promotion

This enables input connections to the PathFilter "paths" plug - this allows it to be promoted to box level, be driven by expressions etc. It's feasible for a very nefarious user to drive it with an expression which varies based on the "scene:path" context entry, in which case descendant and ancestor queries would be inaccurate, but a user that nefarious deserves what they get.