Add the methods to the Driver interface
to force the drivers to implement the methods
Upstream-commit: 4d1a537433ede2bbc75b0a4817e8121f9e03fd86
Component: engine
This moves the Diff() operation to a separate Differ interface and
implements a fallback that uses the Changes() results to encode
a diff tar.
Upstream-commit: e82f8c1661f3fa18e4dc6ca3aebe4dcc46e8961b
Component: engine