Revert "add example image and change asset pipeline compilation rules"

This reverts commit dd418db3a5f5e2603661c8410dff3c0ee1747521.
Revert "Revert "add example image and change asset pipeline compilation rules""

This reverts commit 8d7a548f058b58b7aa266c0d81f1278effa3785e.
Revert "vendor compiled assets"

This reverts commit 14d8dd4aed4900024c08a894e860e05178f0cf3b.