made some changes to InteroperableIteratorConcept to match the current

docs, as per suggestions from Dave and Thomas


[SVN r21718]

libs/iterator

@@ -1 +1 @@
-Subproject commit a0bb423311901cb83ef5408087dcbc705663dc3e
+Subproject commit 2d1e40bd201ea5e97c1633350fc36710d96db271