- Rename `increment_or_decrement` to an apt `set_cache_value` since it actually doesn't increment/decrement in localstore.
use ARel factory methods for building AST nodes

This abstracts us from the actual construction of the nodes
do not rely on method_missing hitting arel

arel methods are not supposed to be public API for ActiveRecord
synchronize changelogs and 4.1 release notes. [ci skip]

Conflicts:
	actionpack/CHANGELOG.md
	activerecord/CHANGELOG.md
	activesupport/CHANGELOG.md
	railties/CHANGELOG.md
update comments to reflect that options support is not available
Fix Generation of proper migration when
  ActiveRecord::Base.pluralize_table_names = false.

  Previously, generation a migration like this:

      rails g migration add_column_name_to_user name

  would not generating the correct table name.

Fixes #13426.
clarify CHANGELOG [ci skip].
Refactored code to depend on connection handler's #with_connection instead of #connection.

Any place that called #connection that did not store it in some field was changed to use #with_connection because #with_connection will create a connection, run the block that needs that connection, and then let go of the connection so that connections are held onto.