Fixed up definition of facade's iterator_category

fixed table widths in new-iter-concepts

cross-referenced interoperability concept in iterator_facade_tutorial

iterator_traversal can't satisfy UnaryTypeTrait: that's a boolean trait.


[SVN r21742]

libs/iterator

@@ -1 +1 @@
-Subproject commit 42147b9e86f6bcdd377d5f6fe45e721885d59198
+Subproject commit f1f6262be7aea1e11b3ce43b10a97b3cb64264dd