Get addremove to use new walk code. It is now more verbose than it used to be. If given file names, it prints nothing, as before. But if given patterns or nothing, it prints the names of the files it is operating on, to remove that air of mystery. It also now operates at or below the current directory.

diff -r 3903775176ed b
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+123
diff -r 3903775176ed b
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+123