Swap highlightjs with pygments

README.disable_asc

 :spring_version: 3.2.4.RELEASE
 :spring_boot_version: 0.5.0.M4
 :icons: font
-:source-highlighter: highlightjs
+:source-highlighter: pygments
 
 This guide walks you through the process of creating a "hello world" link:/understanding/REST[RESTful web service] with Spring.