I am using IDEA 12. I cannot include /out directory into my project.
I tried Project Structure -> Modules -> MyModule -> Sources and then click on Exclude, but nothing happens. /out directory still remains excluded and red-colored.
Is this a bug or I am doing it wrongly?
Screenshot

I can’t deselect Exclude to make folder included.
It looks like Android specific bug, I’ve created a new issue, please vote: