update guides to new version of rails 3.2.x[ci skip]
Merge pull request #13177 from kuldeepaggarwal/doc-upgrade

update guides to new version of rails 3.2.x [ci skip]
Update guides welcome page to point to version 3.2.16 [ci skip]
Update changelog [ci skip]
Run Travis tests using Ruby 2.1.0-preview2 too
Escalate missing error when :raise is true

Before ec16ba75a5493b9da972eea08bae630eba35b62f,
ActionView::Helpers::TranslationHelper#translate has raised errors with
specifying options[:raise] to true.

This should work by this fix:

     begin
       t(:"translations.missing", raise: true)
     rescue I18n::MissingTranslationData
       p :hello!
     end
Merge pull request #13183 from sorah/never_ignore_i18n_translate_raise_option

Escalate missing error when :raise is true in translate helper, fix regression introduced by security fix.
make the type_map per connection. fixes #13182
Add application verifier

It is an application global verifier that can be used to generate and
verify signed messages.

See the documentation of ActiveSupport::MessageVerifier for more
information.
Add documentation and CHANGELOG entry to Application#verifier
Rename verifier to message_verifier
Add missing require
Make possibile to get different message verifiers
No need to configure salts
Don't need to use a controller to test the verifier
Update the releases notes
Test if two different verifiers don't share the same secret
Fix typos
Make salt argument required for message verifier
Hightlight message verifier in the release notes [ci skip]