I'm using rails 4 & ruby 1.9.3 for my application and fancybox2-rails gem, but there's a general problem with asset pipeline. If I run rake task for precompile, then everything is fine except for images in vendor/assets/images and ../gems/ruby-1.9.3-p327/gems/fancybox2-rails-0.2.1/vendor/assets/images. Images from these two folders are not being precompiled and eventually I have a problem with dea
![rails 4 asset pipeline vendor assets images are not being precompiled](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)