Add App extras info

app.go

@@ -62,6 +62,8 @@ type App struct {
 	Email string
 	// Writer writer to write output to
 	Writer io.Writer
+	// Other custom info
+	Extras map[string]interface{}
 }
 
 // Tries to find out when this binary was compiled.

command.go

@@ -197,7 +197,7 @@ func (c Command) HasName(name string) bool {
 
 func (c Command) startApp(ctx *Context) error {
 	app := NewApp()
-
+	app.Extras = ctx.App.Extras
 	// set the name and usage
 	app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
 	if c.HelpName == "" {