Break up DependencyModule's dual function of providing a "depend_on" DSL and "included" block DSL into separate modules. But, unify both approaches under AS::Concern.

Get rid of 'Object#send!'. It was originally added because it's in Ruby 1.9, but it has since been removed from 1.9.
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Conflicts:

	actionpack/test/controller/layout_test.rb

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

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Fixed that verification violations with no specified action didn't halt the chain (now they do with a 400 Bad Request) [DHH]

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Standardize on using hyphens rather than colons to separate option names from their explanation in documentation. Replace + with tt tags. Closes #8732. [ryanb]

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Remove unnecessary returns from builtin filters since render/return is now sufficient. Closes #9952 [Josh Peek]


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documentation fixes for ActionController::Verification::ClassMethods verify method.  Closes #4310.  [oleg.frolov@gmail.com]

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Added :add_headers option to verify which merges a hash of name/value pairs into the response's headers hash if the prerequisites cannot be satisfied

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Added :xhr => true/false option to verify so you can ensure that a request is coming from an Ajax call or not #1464 [Thomas Fuchs]

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Automatically extend the class which gets a module included with the ClassMethods module if it exists #970 [Lucas Carlson]

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Added include_seconds option as the third parameter to distance_of_time_in_words which will render "less than a minute" in higher resolution ("less than 10 seconds" etc) #944 [thomas@fesch.at]

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Added Verifications that allows you to specify preconditions to actions in form of statements like <tt>verify :only => :update_post, :params => "admin_privileges", :redirect_to => { :action => "settings" }</tt>, which ensure that the update_post action is only called if admin_privileges is available as a parameter -- otherwise the user is redirected to settings. #897 [Jamis Buck]

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