Add "on snatch" options to XBMC & Plex notifications

fix #1379

couchpotato/core/notifications/xbmc/__init__.py

@@ -31,6 +31,13 @@ config = [{
                     'default': '',
                     'type': 'password',
                 },
+                {
+                    'name': 'on_snatch',
+                    'default': 0,
+                    'type': 'bool',
+                    'advanced': True,
+                    'description': 'Also send message when movie is snatched.',
+                },
             ],
         }
     ],