Adding doc for 3.1 - Setting up your development environment
Adding doc for 3.1 - Setting up your development environment

gocd/docs.go.cd,ketan/docs.go.cd,gocd/docs.go.cd,gocd/docs.go.cd,ketan/docs.go.cd,gocd/developer.go.cd,gocd/developer.go.cd,ketan/docs.go.cd,gocd/developer.go.cd