Fix inflection in reflection

Hello guys, i am suggesting this patch to resolve a problem the inflector in my language in relations has_many.
We have grammar rules that singularize the first word in compounds words

See how is the singular and plural in my idiom
ActiveSupport::Inflector.inflections do |inflect|

inflect.irregular 'plano_de_contas_base', 'planos_de_contas_base'
inflect.irregular 'plano_de_contas', 'planos_de_contas'

end

I found this solution to singularize correctly

class_name = name.to_s.camelize
output PlanosDeContas

class_name.singularize
output PlanosDeConta

name.to_s.singularize.camelize
output PlanoDeContas, it should be done

has_many example

book-keeper in portuguese
class PlanoDeContas < ActiveRecord::Base

belongs_to :banco

end

bank in portuguese
class Banco < ActiveRecord::Base

has_many :planos_de_contas

end

cheers!