Traces I18n translation keys lookup.

Works with Rails 3.1.3

Just doing something like what is shown in this post from Tilo Sloboda, kind of gemified.

#Gemfile
gem 'i18n_lookup_tracer'

#config/initializers/i18n_lookup_tracer.rb
I18nLookupTracer.setup if Rails.env.development?

As it's very bad for the rendering speed, you may want to add an extra condition.

Then, calling the label related to the name attribute of an Organization model in a form builder, you're going to see in your in console :

 I18n key lookup: fr.helpers.label.organization.name
 I18n key lookup: fr.activerecord.attributes.organization.name
 I18n key lookup: fr.attributes.name

Feel free to contribute and just say hi @clmntlxndr