什么是在rails 3.1（pdf表单，xls文件等）中存储静态资产（文件）的最佳位置

I have a bunch of static assets ( not jpg, css, & js) - rather files like pdf forms, xls that I need to serve to users. They rarely change. Before I used to store them in public folder, but with the introduction of the assets pipeline in rails 3.1 what is the best place to store files like that now now?I have a bunch of static assets ( not jpg, css,