update Railtie insert

Author: mrichie

.gitignore

@@ -3,4 +3,4 @@ rdoc/*
 *.gem
 .bundle
 .rvmrc
-*/*.swp
+*.swp

lib/geocoder/railtie.rb

@@ -18,7 +18,7 @@ class Railtie < Rails::Railtie
 
   class Railtie
     def self.insert
-      if ENV['RAILS_GROUPS'].to_s != 'assets' and defined?(::ActiveRecord)
+      if defined?(::ActiveRecord)
         ::ActiveRecord::Base.extend(Model::ActiveRecord)
       end
     end