Implemented a fuller stub in AjaxTestCase for url_for because link_to calls url_for on all urls passed to it.  Tests that were testing different input types for the url were failing because of this.

Georgetown TimeZone is now mapped to "America/Guyana" instead of "America/Argentina/San_Juan" [#1821 status:resolved]

Signed-off-by: NYehuda Katz <wycats@Yehuda-Katz.local>

Move Rails::Rack::Metal to Rails::Application::Metal and just add cascade if any metal was declared.

Conflicts:
	actionmailer/lib/action_mailer/base.rb