Remove indices from eager load paths.

This is perhaps only an issue with the classic autoloader, but it makes sense for the change to happen either way. This fix hopefully resolves #1191 and #1195, and was possible due to debugging assistance from @atomical and @thebravoman.

lib/thinking_sphinx/railtie.rb

@@ -17,6 +17,11 @@ class ThinkingSphinx::Railtie < Rails::Railtie
           Rails.root.join("app", "indices").to_s
         )
       end
+
+      Rails.application.config.eager_load_paths -= [
+        Rails.root.join("app", "indices").to_s
+      ]
+      Rails.application.config.eager_load_paths.freeze
     end
   end