Fix name of nested attributes option include_id

The option to disable including a hidden ID field on a `fields_for` nested association was incorrectly documented as `hidden_field_id` instead of `include_id`
Merge pull request #11017 from stormsilver/patch-1

Fix name of nested attributes option include_id
ActiveModel::Model inclusion chain backward compatibility
`inspect` for AR model classes does not initiate a new connection.
fix "will be ran" and "has began" typos in configuration guide
Merge pull request #11024 from pdorrell/master

Fix 3 typos in Configuration guide
Merge pull request #11020 from fredwu/master-activemodel-inclusion-chain-fix-iii

ActiveModel::Model inclusion chain backward compatibility
Add bare actionview gem to the root directory

This commit creates structure for Action View gem and is first of a
series of commits extracting Action View from Action Pack.
Move actionpack/lib/action_view* into actionview/lib
ActionView version should be 4.1.0
Move template tests from actionpack to actionview
Remove unneeded files
Add actionpack as actionview's development dependency

ActionView still relies on ActionPack in some of the tests.
Remove unneeded test fixtures in AV
Copy company test fixture to AV (fixes failing test)
Remove digestor fixtures from AP

They were moved to actionview/ and are not used in actionpack
Fix digestor tests
Remove require to AP stuff that left
Template test were moved to AV
Add ActionView to CI