Imports in classes/structs/templates are not recognized

Somewhat more annoyingly this also happens with templates, where you actually need the import in there if you're using it as a mixin:

module foo;
template Foo() {
	import tango.io.Stdout;
	void foo() { Stdout("HELLO").newline; }
}

import foo;
mixin Foo!();
void main() { foo(); }

This can be worked around by putting the import both inside and outside the aggregate, though this might in turn cause unwanted collisions since there's extra stuff in the outer namespace.