This is just a zipped application bundle, I'm guessing you should be able to just unzip and use it as-is. I haven't bothered to try to create a DMG file yet, but it seems like it wouldn't be complicated. It also probably doesn't add much benefit apart from automatically adding it to the Applications folder.
I don't think the configuration file is being properly handled (won't retain your settings/preferences between launches). I'll probably have to figure out what Mac-specific source code changes need to be made.