adding stubs for command line API

client/command/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"github.com/codegangsta/cli"
+	"os"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "drone"
+	app.Version = "1.0"
+	app.Usage = "command line utility"
+	app.EnableBashCompletion = true
+
+	app.Commands = []cli.Command{
+		NewEnableCommand(),
+		NewDisableCommand(),
+		NewRestartCommand(),
+		NewWhoamiCommand(),
+	}
+
+	app.Run(os.Args)
+}