Jun 1, 2016 Optimize png images using Google's zopflipng! 317 images optimized! content/doc/book/resources/hardware-recommendations/jenkins.png | Bin 18040 -> 13207 bytes content/doc/book/resources/hardware-recommendations/jnlp-slave.png | Bin 53498 -> 26563 bytes content/doc/book/resources/hardw...