be more specific about csrf token and ajax - not whitelisted outside of jquery-rails [ci skip]
Fix breakage in XmlMini

- Boolean parsing breaks on non strings (i.e. integer 1|0)
- Symbol parsing breaks on non strings.
- BigDecimal parsing breaks due to missing require.
- Update changelog.
psql implementation of #index_name_exists?
Do not discard query parameters on requests that use wrap_parameters
Fixes issue with parsing whitespace content back from database - fixes #13907
Merge pull request #12769 from birkirb/master

Boolean parser blows up on a Fixnum.

Conflicts:
	activesupport/CHANGELOG.md
Merge pull request #13912 from mauricio/bug-13907

Fixes issue with parsing whitespace content back from database - fixes #13907
Merge pull request #13863 from joshjordan/jsj-dont-throw-out-get-params

Do not discard query parameters on requests that use wrap_parameters

Conflicts:
	actionpack/CHANGELOG.md
Merge pull request #13688 from jbaudanza/psql-index-exists

PostgreSQL implementation of SchemaStatements#index_name_exists?

Conflicts:
	activerecord/CHANGELOG.md
Make arel methods private API

Since its conception arel was made to be private API of Active Record.
If users want to use arel features directly we should provide a way
using the Active Record API without exposing the arel implementation.
Remove warnings for already defined methods
Don't require BigDecimal serialization extension

Rails currently provides an extension to BigDecimal that redefines how
it is serialized to YAML. However, as noted in #12467, this does not
work as expected. When ActiveSupport is required, BigDecimal YAML
serialization does not maintain the object type. It instead ends up
serializing the number represented by the BigDecimal itself which, when
loaded by YAML later, becomes a Float:

```ruby
require 'yaml'
require 'bigdecimal'

yaml = BigDecimal('13.37').to_yaml
YAML.load(yaml).class

require 'active_support/all'

yaml = BigDecimal('13.37').to_yaml
YAML.load(yaml).class
```

@tenderlove posits that we should deprecate the custom BigDecimal
serialization and let Ruby handle it. For the time being, users who
require this serialization for backwards compatibility can manually
`require 'active_support/core_ext/big_decimal/yaml_conversions'`.

This will close #12467 and deprecate the custom BigDecimal#to_yaml.

Signed-off-by: David Celis <me@davidcel.is>
Remove BigDecimal#to_d

This was backported for Ruby 1.8 support and is no longer needed.

Signed-off-by: David Celis <me@davidcel.is>
Merge pull request #13911 from davidcelis/remove-bigdecimal-serialization

Deprecate custom BigDecimal serialization

Conflicts:
	activesupport/CHANGELOG.md
Fix isolated tests
Assert the file is deprecated
Adding an documentation example and a test to button_to with path

I did not see in the docs that `button_to` supports not only URLs but paths as well. I documented this functionality with a unit tests and added an example to the docs as well.
Merge pull request #13924 from adomokos/adding_path_examples_to_button_to_tests

Adding a documentation example and a test to button_to with path
fix HABTM w/out primary key errors on destruction
Fixes the camelCase variable name in the docs [ci skip]