Allow autoloading to work as intended and avoid multiple requires.

Added use_two_digit_numbers select_tag option for displaying months and days with leading zeros without affecting the values (useful for e.g. ISO-style dates, 2011-08-01).
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Conflicts:

	actionpack/CHANGELOG.md

This support is near-identical to the existing submit_tag support.

Example:

    <%= form_for @post do |f| %>
      <%= f.button %>
    <% end %>

Is wrong use ProcessedAsset#to_s since it returns the content of the file.

Make ActiveSupport::Benchmarkable a default module for ActionController::Base, so the #benchmark method is once again available in the controller context like it used to be *DHH*

Rails will now use your default layout (such as "layouts/application") when you specify a layout with `:only` and `:except` condition, and those conditions fail.

For example, consider this snippet:

    class CarsController
      layout 'single_car', :only => :show
    end

Rails will use 'layouts/single_car' when a request comes in `:show` action, and use 'layouts/application' (or 'layouts/cars', if exists) when a request comes in for any other actions.

Currently if you're do this:

    assert_template :layout => "foo"

Regardless of what layout you were using, the test will always pass. This was broken since the introduction of :layout option in [d9375f3f].

We have a lot of test cases in actionpack/test/controller/layout_test.rb that use this feature. This will make sure that those test cases are not true negative.

Let's do the same trick for asset_path that we do for [image,javascript,stylesheet]_path to avoid namespace conflicts on named routes.
Closes #3427

Named Routes shouldn't override existing ones (currently route recognition goes with the earliest match, named routes use the latest match)

Minor enhancement by not unnecessarely escaping forward slashing within a curly regexp and by mentoining the protocol relative scheme in the internal comment

Fix for redirect_to to respect urls with a network path reference like "//asset.host.com/resources/1235" see issue #3856