Add support for mount RackApp, :at => "/sprockets" with a shorthand of mount Sprockets => "/sprockets". 

This is different from the match syntax in that it cannot be used for controller/action and it does not 
assume an anchor at the end of the match. 

For instance, in the above example, if the client asked for "/sprockets/foo.js", the Sprockets app would
have a SCRIPT_NAME of "/sprockets" and PATH_INFO of "/foo.js".

[#3911 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

add lazy_load_hooks.rb, which allows us to declare code that
should be run at some later time. For instance, this allows
us to defer requiring ActiveRecord::Base at boot time purely
to apply configuration. Instead, we register a hook that should
apply configuration once ActiveRecord::Base is loaded.

With these changes, brings down total boot time of a
new app to 300ms in production and 400ms in dev.

TODO: rename base_hook

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

new member action.

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Added shorthand for match 'products/overview' that expands to match 'products/overview', :to => 'products#overview', :as => 'products_overview'

The real use case it to make all of the following act the same:

  root 'store#index', :as => 'store'
  match '/' => 'store#index', :as => 'store'
  match '/', :to => 'store#index', :as => 'store'

The test case provided deviates from this in order to demonstrate all three
forms in a single set of test routes.
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Routing: fix that route shorthand shouldn't ignore other options. Raise if :as option is given to root method since its name is always 'root'

:to => redirect() can take a String using 1.9-style interpolation or proc that takes the path parameters as a Hash

named_route [#3561 state:resolved]