sign test passed
pay success !
Merge remote-tracking branch 'upstream/develop' into weixin_pay

Conflicts:
	werobot/client.py
add query and delivernotify
fix \u in message
prepare for callback sign
fix sign string1 for order query
fix sign error in ios
补充支付文档
Merge remote-tracking branch 'upstream/develop' into weixin_pay

Conflicts:
	werobot/client.py
Merge pull request #56 from tg123/weixin_pay

Weixin pay