Fix LOAD() in restful context

When you call LOAD() on a controller who has some actions decorates with @request.restful(), it fail with:
@request.restful()
TypeError: 'NoneType' object is not callable
=> because LOAD use other_request variable who are a Request but without all methods and therefore without restful method.
I've just mock the restful method but I think that the real restful method will be better...
Inject restful method for LOAD()

Better solution than my last commit for the restful method by inject the real restful method.
We can now call LOAD() on a @request.restful() decorated action.
Merge pull request #441 from dokime7/patch-3

Fix LOAD() in restful context