be more specific about csrf token and ajax - not whitelisted outside of jquery-rails [ci skip]
`find_in_batches` now returns an `Enumerator` when called without a block, so that it
can be chained with other `Enumerable` methods.
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.
Fixed typo [ci skip]

singular is more suited to
change to "check out"
setup Bundler in engines `bin/rails` stub.

This is necessary when bundling gems locally using `BUNDLE_PATH`.
Without this patch `bin/rails` fails with:

```
/Users/senny/.rbenv/versions/2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- rails/all (LoadError)
	from /Users/senny/.rbenv/versions/2.0.0-p353/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from bin/rails:7:in `<main>'
```
e-mail => email, and subject/verb agreement
add punctuation
Remove duplicate configuration option for ActiveSupport [ci skip]

Fixes rails/rails#13732
psql implementation of #index_name_exists?
set encoding to binmode for pipe
spring gem moved to rails/spring
Merge pull request #13756 from huoxito/rails-spring

spring gem moved to rails/spring
Spring in now under rails/spring [ci skip]
Merge pull request #13759 from raysrashmi/rails-spring

Spring in now under rails/spring [ci skip]
Update Changelog, Spring is under rails/spring [ci skip]
Merge pull request #13762 from robertomiranda/spring-under-rails

Update Changelog, Spring is under rails/spring [ci skip]
Merge pull request #13745 from nextgearcapital/master

set encoding for pipe to binary mode
Add link to upgrade guide for full list of deprecated finders [ci skip]
Update Error Message when secrets.secret_key_base isn't given