see here 4d4ff531 

The use of `store` on Hstore fields (for instance) is not needed
because serialization aimed to interact with Ruby objects and not
with provided field types

See rails/rails#12608

See #8328

Code Highlighted

Code style adherence

This reverts commit 49f513c2.

Reason: Changelogs aren't supposed to be edited in docrails.

Prepare generated Gemfile for Capistrano 3

Add missed require making `enable_warnings` available

Capistrano 3 is now rails-less, so we need to encourage developers to use capistrano-rails gem.

More details: http://www.capistranorb.com/documentation/frameworks/ruby-on-rails/

[ci skip]

Add --model-name option into scaffold_controller generator 

Minor Refactoring to `NumberHelper#number_to_human`

Remove size alias for length validation

scope_chain should not be mutated for other reflections

Fix `singleton_class?`

Removed ```The `size` helper is an alias for `length`.``` line. If you use this "nonexist" helper, you will get an error message like this: 

```
ArgumentError: Unknown validator: 'SizeValidator'
...
```

Maybe wanted to mean ```validates_size_of``` helper as an alias for ```validates_length_of``` helper.

Due to changes from http://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/39628 current `singleton_class?` implementation fails.
Changed based on reference from http://bugs.ruby-lang.org/issues/7609

* Use destructive `map` and `sort_by` to save extra object creation.
* Create `INVERTED_DECIMAL_UNITS.invert` constant instead of repeatedly doing `DECIMAL_UNITS.invert`

`$SAFE = 4;` has been removed with Ruby 2.1

For background -
https://bugs.ruby-lang.org/issues/8468
Changset - https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/41259/diff/test/ruby/test_thread.rb

Currently `scope_chain` uses same array for building different
`scope_chain` for different associations. During processing
these arrays are sometimes mutated and because of in-place
mutation the changed `scope_chain` impacts other reflections.

Fix is to dup the value before adding to the `scope_chain`.

Fixes #3882.

SQLite3 Adapter datatypes cleanup

Remove `default_primary_key_type`  and extract contains of `native_database_types` to a constant since they aren't conditional now in SQLite3Adapter. Makes it more like other adapters.

Merge pull request #9499 from dmitry/inverse_instance_should_not_be_reloaded_after_stale_state_change

Inversed instance should not be reloaded after stale state was changed

Conflicts:
	activerecord/CHANGELOG.md

Remove sqlite specific`supports_autoincrement?` which defaults to true