Fix ActiveRecord locking column defaults not getting persisted

When partial inserts are enabled, overridden db defaults are ignored. This
results in locking columns having a nil value for new records if the db default
is null. This happens because the list of changed attributes for new records is
always assumed to be empty.

Solution: When a new record's default attributes are set, also initialize the
list of changed attributes by comparing current values against what's stored as
the column defaults in the database.
Raise an ArgumentError when a clashing named route is defined
Tweak exception message to avoid giving potentially misleading suggestions
Add Error#full_message test; Fix typos

Introduce test on Error#full_message for attribute with underscores; Fix
some typos
Add a method full_messages_for to the Errors class
Fix some typos
Fix update_version_rb task
Merge pull request #9901 from vipulnsward/fix_some_typos

Fix some typos
Merge pull request #9902 from robertomiranda/fix-release-task

Fix update_version_rb task
Use jquery-rails from github

completes https://github.com/rails/rails/commit/6f3f0f86332004fcee5c2f05d52bbff08c22f980
Updated docs due to removal of serializer accessor
Merge pull request #9904 from rubys/jquery-rails-github

Use jquery-rails from github
Merge pull request #9905 from docunext/master

ActiveSupport::MessageVerifier: Updated docs due to removal of serializer accessor
Merge pull request #9704 from trevorturk/warn-about-skipped-routes

Raise an ArgumentError when a clashing named route is defined
Merge pull request #9489 from obrie/fix/overridden_defaults_changed_attributes

Fix ActiveRecord locking column defaults not getting persisted
Introduce UpgradeLegacySignedCookieJar to transparently upgrade existing signed cookies generated by Rails 3 to avoid invalidating them when upgrading to Rails 4
Relaxed jbuilder dependency and bumped version number

Newer version contains some generator bugfixes
Merge pull request #9912 from rwz/jbuilder-bump

Relaxed jbuilder dependency and bumped version number
Put coffee-rails in top-level of generated Gemfile

v3 of pull request based on additional feedback from @jeremy
Merge pull request #9881 from gkop/master

Support .js.coffee views by default