More changes related to iterators:

- Fixed the access categories to be proper
- Removed iterator generator classes.
- Custom iterator adaptors is now gone!


[SVN r19696]

libs/multi_array

@@ -1 +1 @@
-Subproject commit 49b928a2ab78524ddcf6026c5ed01dc8a09e2a6f
+Subproject commit ea278bfd8834b5bb85cd817443b39ddb7159269a