any_equal -> contains

and moved iota to detail/algorithm.hpp


[SVN r12000]

libs/graph

@@ -1 +1 @@
-Subproject commit 68b55f244d966e3b2653431e2c5d9e70824b4083
+Subproject commit b761b44a0d054a77a24df511b28bb281fd7c2d1c