Java init script instead of complex configuration templating

Just adopt convention that:

• if there is Start.java in workdir — load and run via Scripting language subsystem
• - if not — run the default, compiled domain.package.DefaultStart class
• - Start has single abstract method — call and implements Callable<Injector>
• - Configuration is interface that allows to instantiate various Modules and is basically a DI container interface

To prevent abuse it’s advised to run lint on Start.java files and prevent usage of reflection and any packages outside of some of java.util.* and org.domain.Injector.