Currently for most of the bundlers a large portion of the resources used to build the bundlers are loaded from the classpath. Stuff like icons, install scripts, other such resources.

1. Provide a means to generically say "comes from this file root" insead of relying on the classapth
2. Audit the existing resources loaded so that files that don't have a specific bundler override can have a specific, per resource, override
3. Ensure that existing default still function as fallback (i.e. icons go to <AppName>.png, etc).