make it possible to rename 'public'

[dherman]

The assets directory generates a 'public' directory. It would be great if that could be configured with a custom name, or even configured just to go to the root directory.

Dave

[logicalparadox]

How about an assetsOut config option. I'm thinking it would be relative to the out directory. This would also solve the "root assets" previous issue opened (#15). For backwards compatibility it will default to public.