Parameter matching does not recognise primitives

Given the following annotated method:

``` java
    @GET
    @Path("/mystuff/{id}")
    public Response doMyStuff(@PathParam("id") int id) {
        ...
    }
```

.. a call to `/mystuff/1` will not match successfully. Changing the `int id` to `Integer id` causes the method to match, but is very unobvious. I assume that is also the case with the other Parameter types (Header etc..)
