I've updated the Chainsaw pom.xml but some of the plugin updates mean you have to specify a bit more to get everything built...specifically, I have to specify assembly:assembly now to get the standalone zip built...
Anyone familiar enough with maven assembly plugin to figure out what needs to be done to get standalone.zip built automatically? Here's the command I use to build Chainsaw: mvn clean site:site assembly:assembly package install osxappbundle:bundle