I have add a new option to enable publish feed price for standby delegate
Script stop working

, error:
2015-07-07 13:51:23,182[INFO]: fetch price is 0.03798 CNY/BTS, volume is 35493.036
2015-07-07 13:51:48,158[ERROR]: dictionary changed size during iteration
Traceback (most recent call last):
File "bts_delegate_task.py", line 307, in excute
self.task_feed_price()
File "bts_delegate_task.py", line 257, in task_feed_price
self.check_median_price(median_price, current_feed_price)
File "bts_delegate_task.py", line 202, in check_median_price
for asset in median_price.keys():
RuntimeError: dictionary changed size during iteration