Merge Down: convert to new path-based API
authorAndrew Chadwick <andrewc-git@piffle.org>
Mon, 13 Jan 2014 00:46:15 +0000 (00:46 +0000)
committerAndrew Chadwick <andrewc-git@piffle.org>
Tue, 4 Feb 2014 00:57:40 +0000 (00:57 +0000)
commitd2ad903c9e26dc5fe9693f707e07e3ab7cc53da7
tree42d106b3039dd95aca4e310919bae3c73643c84b
parente436940a137074aa84cedb24114bff15561de71b
Merge Down: convert to new path-based API

Update Merge Down command to use paths, and not to not use composition in
its undo stack object.

The old Merge Down is *highly* contextual in the new model, so reflect that
in the command's status.
gui/document.py
lib/command.py
lib/document.py
lib/layer.py