Made some more changes to the agent documentation.
Made some more changes to the agent documentation.

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