If we fail to return a serializble type fallback to standard default …

…method to raise exception, rather then recursing forever causing max recursion depth exceeded error. (#80)

thehive4py/models.py

@@ -18,7 +18,7 @@ def default(self, o):
         if isinstance(o, JSONSerializable):
             return o.__dict__
         else:
-            return json.JSONEncoder.encode(self, o)
+            return json.JSONEncoder.default(self, o)
 
 
 class JSONSerializable(object):