I don't know which is the use case for button_to_function(name)
but there's a test for it. I am focused now on RJS extraction
and do not want to introduce a backwards incompatible change
at this moment. Perhaps worth revisiting when the whole thing
is done.

Deprecate defining scopes with a callable (lambda, proc, etc) via the scope class method. Just define a class method yourself instead.

Evaluate default scopes at the last possible moment in order to avoid problems with default scopes getting included into other scopes and then being unable to remove the default part via unscoped.

Deprecated support for passing hashes and relations to default_scope, in favour of defining a 'default_scope' class method in the model. See the CHANGELOG for more details.

Removing the scope-caching which happens on association proxies, because the query is already cached by the query cacher. For formalised proof see http://www.youtube.com/watch?v=wDefXLb-FDs

Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

Update guides reflecting that scaffold_controller generator generates now code for JSON response instead of XML

Reason: The original sentence is correct. Please note the guide
covers the stable version of Active Support.

This reverts commit 5265650d.