Date#to_time and Date#xmlschema methods defined in Ruby 1.9.3

Introduced in 3bfd99de.
Related to #8840.

[ci skip]

Clearer conditional in constraint match check

Adding tests to cover untested methods in errors_tests.rb

Fixed nested fields bug when called with AssociationProxy

Correct source for in_clause_length for eager loading (Fix for #8474)

Fix json params parsing regression for non-object JSON content.

Fixes #8845.

Controller scaffold codestyle

Specified jbuilder version

Updating Array access docs more consistent

[ci skip]

Add asset pipeline guides section on implementing & registering own engines

Revert "Bump bundler dep to 1.3.0.pre.4+ to introduce 'bundle binstubs <gem>'"

This reverts commit e00b8ecf.

Revert "Use bundler --pre for travis builds"

This reverts commit 4d240ec2.

Include jbuilder by default and rely on its scaffold generator to show json API. The default scaffold will now just create HTML if the user actively opts out of jbuilder

Mention performance test extraction in 4.0 guide

Extract ActionDispatch::PerformanceTest

Evaluate view_cache_dependencies at the instance level

Conflicts:
	actionpack/lib/action_controller/caching.rb

Remove redundant double quotation marks [ci skip]

Fix a typo in a test.

Set default value to ActiveModel::Validator initializer attribute