Added support for server start and distribution to build

This commit includes build script changes so that the server can be executed using gradlew (gradlew runServer). I've also added the minimal properties to support packaging a distribution using gradlew distZip/distTar. Could probably change to use the standard gradlew run -Pargs="...", but this works for now.

I was originally thinking that the run settings could go into their own .gradle file, but have included under the suro-server project, hence the removal of the dead reference in the last push.