Nested complex types fall back to any

[unstubbable]

In our project some types fall back to any (error message: Failed to infer PropType; Fallback to any). It seems that nested complex types could be a cause of those issues, e.g.:

static propTypes = {
  foo: React.PropTypes.arrayOf(React.PropTypes.shape({
    bar: React.PropTypes.string,
    baz: React.PropTypes.string
  }))
}

[KnisterPeter]

@KingHenne is this still valid?

[unstubbable]

After the recent changes the listed issues are now mostly caused by references to imported objects. Thanks for the improved error messages!