Use native-packager java-application archetype for packaging (for now).

* Annotate types on public members in PlayCommands
* Ensure script has executable permissions
* Update to use java_application settings rather than just base packaging.
Bump native packager to latest milestone.

* Update PlaySettings to bat file is generated
* Bump milestone build of native package

Note to @huntc -> We can remove the play-based script generation after this commit
and native packager will make a script.  Probably not exactly what we need yet though.