Fix users.

README.md

@@ -60,7 +60,7 @@ Follow this [document](https://github.com/apache/incubator-skywalking/blob/maste
 * QQ Group: 392443393
 
 # Users
-<img src="https://skywalkingtest.github.io/page-resources/users/users-2018-07-27-2.png"/>
+<img src="https://skywalkingtest.github.io/page-resources/users/users-2018-08-12.png"/>
 
 - [Users list](docs/users.md)
 - [Submit new user to us.](https://github.com/apache/incubator-skywalking/issues/443)

docs/users.md

 # Users
 
-All use cases are reported through direct message/mail or [online issue](https://github.com/apache/incubator-skywalking/issues/443), 
-if any entity(company or orgnization) has any doubt, please contact us by [any official channel](../README.md#contact-us).
+All users are reported through direct message/mail or [online issue](https://github.com/apache/incubator-skywalking/issues/443), 
+if any entity(company or organization) has any doubt, please contact us by [any official channel](../README.md#contact-us).
 
 - 300.cn 中企动力科技股份有限公司 http://www.300.cn/
 - 4499.com 四三九九网络股份有限公司. http://www.4399.com/