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.

This patch adds ability to set custom console if you want to use
something other than IRB. Previously the hack that people used
was:

    silence_warnings do
      require 'pry'
      IRB = Pry
    end

which is not the best way to customize things.

In Ubuntu Chrome, in the last lines of code blocks, the underscore isn't
visible. Increasing the line height slightly seems to fix this. This
problem doesn't exist in Firefox even on Ubuntu. Too lazy to test in
any other OS-browser combo :)

Partially reverts 14c89e72.

Hat tip to @tenderlove for paring down the TestTask!

$ curl -s http://www.ietf.org/rfc/rfc4287 | grep -io ATOM | sort | uniq -c
    582 atom
    175 Atom

Adds `image_url`, `javascript_url`, `stylesheet_url`, `audio_url`,
`video_url`, and `font_url` to assets tag helper. These URL helpers will
return the full path to your assets. This is useful when you are going
to reference this asset from external host.

Also remove an unasserted line in the tests.

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.

collection_radio_buttons

[Carlos Antonio da Silva + Rafael Mendonça França]

[Carlos Antonio da Silva + Rafael Mendonça França]