Added query to Request with matcher and test

vcr/request.py

@@ -27,6 +27,11 @@ class Request(object):
     def path(self):
         return urlparse(self.uri).path
 
+    @property
+    def query(self):
+        q = urlparse(self.uri).query
+        return sorted(parse_qsl(q))
+
     @property
     def url(self):
         return self.uri