Add links to spring-cloud

README.md

 This project is an umbrella and the git repository is used only for
-documentation (see gh-pages branch).
+documentation (see gh-pages branch). Home page: https://projects.spring.io/spring-cloud.
+
+The sub-projects of Spring Cloud live in a different Github
+organization: https://github.com/spring-cloud
 
 If you are looking for the project formerly known as Spring Cloud, please 
-go https://gtihub.com/spring-cloud/spring-cloud-connectors.
+go https://github.com/spring-cloud/spring-cloud-connectors.