addremove was not correctly finding removed files when given
a list of files to look at. These end up with a src of 'f' from
walk() but no longer exist on the filesystem.
Index: mine/mercurial/commands.py
===================================================================
\.orig$
\.rej$
~$
\.so$
\.pyc$
\.swp$
\.prof$
^tests/.*\.err$
^build/
^dist/
^doc/.*\.[0-9](\.(x|ht)ml)?$
^MANIFEST$
^\.pc/
^patches/
^mercurial/__version__.py$