This change adds support to the GitPatcher for applying binary files

as part of changes. For git, this requires that we ask git apply to

exclude those particular files while applying, because otherwise it will

error out because there's no binary file data in the patch itself. We

then use the base patcher infrastructure for iterating through the

files, but provide overrides that can register adds, moves, and deletes

with git.

Ran unit tests.
Used rbt patch with a bunch of changes that did various file

  operations on binary files.