When generating a migration that removes a field with an index, the down
will add both the field and its index.

[Carlos Antonio da Silva & Santiago Pastorino]

The main goal is to not generate the format.html block in scaffold
controller, and to generate a different functional test as we don't rely
on redirects anymore, we should test for http responses.

In addition to that, the :edit action is removed from the http
controller and the edit route is not generated by default, as they
usually do not make sense in this scenario.

[Carlos Antonio da Silva & Santiago Pastorino]

[Carlos Antonio da Silva & Santiago Pastorino]

[Carlos Antonio da Silva & Santiago Pastorino]

[Carlos Antonio da Silva & Santiago Pastorino]

Change application controller template accordingly, to inherit from
ActionController::HTTP and not generate protect_from_forgery call.

[Carlos Antonio da Silva & Santiago Pastorino]

Change the default for newly generated applications to whitelist all attribute assignment.  Also update the generated model classes so users are reminded of the importance of attr_accessible.

uses PATCH for the forms of persisted records, and routes PATCH and PUT to the update action of resources

PATCH is the correct HTML verb to map to the #update action. The
semantics for PATCH allows for partial updates, whereas PUT requires a
complete replacement.

Changes:
* adds config.default_method_for_update you can set to :patch
* optionally use PATCH instead of PUT in resource routes and forms
* adds the #patch verb to routes to detect PATCH requests
* adds #patch? to Request
* changes documentation and comments to indicate support for PATCH

This change maintains complete backwards compatibility by keeping :put
as the default for config.default_method_for_update.

It is usually useful to be able to hide a generator when running rails
generate command. Such generators might be used only to dry up
generators code and shouldn't be available to end users.

Support decimal{1,2} and decimal{1-2} and decimal{1.2} so it works fine with bash, zsh, etc, closes #4602

Conflicts:

	railties/test/generators/migration_generator_test.rb

After vendor/plugins were removed from rails, the new method to create
plugins is to create gem plugins. Most of the time if you create a
new plugin in rails application's directory, you want to extract
something from that application and use it immediately, ie. add
such line to Gemfile:

  gem 'foo', :path => './vendor/foo'

This commit makes plugin new generator to add such line automatically.

added ability to specify from cli when generating a model/migration whether particular property should be an index like this 'rails g model person name:string:index profile:string'