Fully merge all of functional (including sublibs).

Should be just documentation and metadata changes. There might be a problem
witht he generated documentation for overloaded_function, if so I'll fix it
very soon.


[SVN r84625]

libs/functional

@@ -1 +1 @@
-Subproject commit eebb4df856253c8170f61a9d2b23d202ae4e85dd
+Subproject commit b271abdda3f96408a9b3bf76a08cf5e5d9d9c2d2