Fortunately, GXT 3 does not have a resources directory. The setup requires with GXT is simpler than GXT 2 was, so we haven't put together a setup tutorial just yet. We're reconsidering this, and will have something up soon.
Instead, you should be able to simply follow the setup.txt in the GXT 3 download. There are just a few steps required to get going:
- add gxt to your project (add the jar to the classpath, add an inherits statement in your module)
- add a reference to reset.css in your html file (the path must be tweaked to point at your module's directory), and make sure you have a strict doctype.