Fix deprecation warning for Rails 3.1 with class_inheritable_accessor -> class_attribute
Fix deprecation warning for Rails 3.1 with class_inheritable_accessor -> class_attribute

reevoo/globalize3,goarch/globalize,rdutra/globalize3,andreazaupa/globalize3,gaganawhad/globalize-cache-key,aalfson/globalize,DaveahamLincoln/globalizer_refinery_patch,distribusion/globalize,Buyapowa/globalize,2947721120/globalize,eet-nu/globalize3,trongrg/single_table_globalize3,ASnow/globalize,awernick/globalize,LyriD/globalize3,tuv/globalize3,mysociety/globalize