indifferent access should recurse Hash subclasses

This commit makes Hash subclasses convert to HWIA by default for nested
objects of subclasses of Hash, but allows certain subclasses to prevent nested
conversion by introducing Hash#nested_under_indifferent_access that subclasses
can overwrite.

ActiveSupport::OrderedHash is one such subclass that overwrites
+nested_under_indifferent_access+, since implicitly converting it to HWIA would
remove the ordering of keys and values in Ruby 1.8.

This change is necessary because commit ce9456ec broke nested indifferent access
conversion for all subclasses of Hash.

Accept single prefix in ActionView::MissingTemplate#initialize

Logs should show overridden method; Issue 426

Add alias `r` for rails runner

Rename duplicate tests

Rename duplicate tests.  There is now one failing test that was failing before the rename but was never getting run.

Namespace Fixtures in ActiveRecord

Several AP tests fail after this change.

This reverts commit aaf01cd5, reversing
changes made to 9cc18c52.

`lookup_context#formats=` being too restrictive, "Accept: text/javascript, */*"
resulted in [:js, "*/*"] formats instead of [:js, :html].
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

[Fixes #439]

ordinalize negative numbers patch

Applied patch by Amir Manji
  https://github.com/rails/rails/issues/437#issuecomment-1116045Signed-off-by: NJason <jasonmichaelroth@gmail.com>

Update README template to include info about app/assets

Updated changelog for jdbc* adapters template.

This reverts commit 886818d2.

Allow AM/PM format in datetime selectors

Fix marshal round-tripping of fractional seconds (Time#subsec).

Stripping tags from a frozen string

properly escape "'" to "'" for XML

Corrected dbconsole usage message

Enumerable should pass encoding options to children in #as_json/#to_json

Hash.from_xml chokes on empty CDATA