v1.4.0 flow statistic and rate limit (#28)

support flow statistic and rate limit

README.md

@@ -89,6 +89,7 @@ API地址：http://demo.fizzgate.com/proxy/[服务名]/[API Path]
 | Fizz-gateway-community | Fizz-manager-professional |
 | ---------------------- | ------------------------- |
 | v1.3.0                 | v1.3.0                    |
+| v1.4.0                 | v1.4.0                    |
 
 请根据社区版的版本下载对应的管理后台版本
 
@@ -188,6 +189,8 @@ Fizz官方技术交流③群：512164278
 
 ## 系统截图
 
+![](https://user-images.githubusercontent.com/6129661/104895987-84618880-59b1-11eb-9a73-a8569a7e6a69.png)
+
 ![](https://user-images.githubusercontent.com/184315/97131368-f5ace900-177e-11eb-9e00-24e73d4e24f5.png)
 
 ![](https://user-images.githubusercontent.com/184315/97131376-f9407000-177e-11eb-8c17-4922b3df5d48.png)
@@ -196,4 +199,4 @@ Fizz官方技术交流③群：512164278
 
 ![](https://user-images.githubusercontent.com/184315/97131381-fba2ca00-177e-11eb-9e59-688dafa76aea.png)
 
-![](https://user-images.githubusercontent.com/184315/97131382-fc3b6080-177e-11eb-908a-a5ffc8b08459.png)
+![](https://user-images.githubusercontent.com/6129661/104897563-7ca2e380-59b3-11eb-8288-39a2b181183d.png)