Problem loading in Rails 3.2

The docs indicate that the library should work in Rails 3.2, but unfortunately the rail tie uses a method that wasn't defined until Rails 4+.  `deep_symbolize_keys` doesn't existing in the Rails 3.2 ActiveSupport implementation. However,  it does exist in the `i18n` gem that Rails 3.2 relies on. I've worked around this for now by expliciitly doing `require 'i18n/core_ext/hash'` in my config/application.rb before initialization is able to begin.