"User interface" for removing all files which are ignored by cvs

(i.e. object files, Makefiles)

diff --git a/cvsclean b/cvsclean
new file mode 100755 (executable)
index 0000000..e98ec49
--- /dev/null
+++ b/cvsclean
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+${MAKE:-make} -f build/build.mk cvsclean