Fixed incompatibility with Gretel
Fixed incompatibility with Gretel

Gretel stubs out controller.controller method to return nil. I've made a workaround for that. All tests pass.

It might have been a better idea to do:

	context.try(:controller) || context

... instead of the code I've written, but it breaks a lot of tests, which it should not.

codeplant/simple-navigation,artofhuman/simple-navigation