Resolving inner definitions on $ref's

[stoiev]

Trying to resolve issue #93

[justinrainbow]

Thanks for the PR @stoiev. Could you add a unit test showing #93 was fixed?

[stoiev]

Hi!
I didn't found a proper location to put this test. It's something between RefResolverTest and Draft4Test (it's a validation test using RefResolver), so I've put on an standalone test on Draft4Test.php for now.
I don't think that it is a proper way to deal with the problem, this commit resolves the problem partially:

{
    "type": "object",
    "additionalProperties":false,
    "properties": {
        "person": { "$ref": "#/definitions/persondef" },  #  this one works 
        "personname": { "$ref": "#/definitions/persondef/name" }  # this one not
    },
    "definitions": {
        "persondef": {
            "type": "object",
            "additionalProperties":false,
            "properties": {
                "name": {
                    "type": "string"
                },
                "age": {
                    "type" : "integer"
                }
            }
        }
    }
}

since it's implemented only on RefResolver (and RefResolver depends on UriResolver to resolver more complex JSON paths). But it resolved my case, and probably the majority of cases using local definitions.

[sraka1]

Please merge this into master! :)

[bighappyface]

Closing in favor of #182