The build_association method was added as an API for plugins
to hook into in 1398db01. This commit restores this API and the
ability to override class.new to return a subclass based on
a virtual attribute in the attributes hash.

Using the correct CSS compressor for the yui-compressor gem.

Update Chicago mayor

instruct user to install using Gem file in database.yml template 

3.1: params_wrapper raises error on anynomous controllers

For Issue #1103 - Fix for sqlite3.yml, mysql.yml

Fixed InnerJoinAssociationTest. Need to load essays fixture.

Don't print deprecation warnings every time the user reads or writes an inheritable attribute.  The warnings on declaration is enough.

Optimize parts of HashWithIndifferentAccess

Adding missing require to join_model_test

Fixing has_many when ActiveRecord::Base.pluralize_table_names is false

generate HTML5 number_field tag for integer fields

cleanups on AMo validator initializers

Add doc to #attribute_names

Make ParamsWrapper use a well-defined API and not rely on AR methods

Add ActiveRecord::attribute_names to retrieve a list of attribute names. This method will also return an empty array on an abstract class or a model that the table doesn't exists.

Fields for fixes for non nested attributes and without object