[fox] Add metadata extraction

Add series, season number, episode number and episode.

youtube_dl/extractor/fox.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 
 from .adobepass import AdobePassIE
 from ..utils import (
+    int_or_none,
     smuggle_url,
     update_url_query,
 )
@@ -47,9 +48,12 @@ class FOXIE(AdobePassIE):
             resource = self._get_mvpd_resource('fbc-fox', None, ap_p['videoGUID'], rating)
             query['auth'] = self._extract_mvpd_auth(url, video_id, 'fbc-fox', resource)
 
-        return {
+        info = self._search_json_ld(webpage, video_id, fatal=False)
+        info.update({
             '_type': 'url_transparent',
             'ie_key': 'ThePlatform',
             'url': smuggle_url(update_url_query(release_url, query), {'force_smil_url': True}),
             'id': video_id,
-        }
+        })
+
+        return info