Support copy and rename
copy/rename destinations being unversioned and possibly ignored by
the extension should not contain expanded keywords.
Files copied/renamed from an ignored source are not touched.
Add tests covering both of the above cases, plus the corner case of
cp symlink foo; hg cp -A symlink foo (where foo becomes a regular file).
syntax: glob
*.pyc
*.pyo
*~
*.swp
*.orig
*.rej
.DS_Store
build/*
MANIFEST