Publish Play Dist zips

We're moving our deploys away from the large monolithic Assembly Jars to the simpler Play Dist Zip files instead. 

The changes here will allow Teamcity to build and publish BOTH the Assembly Jars and the Play Dist files at the same time. This will increase build time a little bit, but once we have a working Play Dist Zip up in production, it should be easy to remove the Assembly Jar step.