Added version flag for command line.

main.go

@@ -13,19 +13,28 @@ import (
 	"os/signal"
 )
 
+const Version = "pre0.1"
+
 func main() {
 
 	var port int
 	var host string
 	var driver string
 	var cacheSize int
+	var version bool
 
 	flag.IntVar(&port, "port", 6379, "port to bind")
 	flag.StringVar(&driver, "driver", "leveldb", "type of database (leveldb, sqlite)")
 	flag.StringVar(&host, "host", "", "host to bind")
 	flag.IntVar(&cacheSize, "cache", 32, "cache size in MB")
+	flag.BoolVar(&version, "version", false, "Print version and exit.")
 	flag.Parse()
 
+	if version {
+		fmt.Printf("Version: %s\n", Version)
+		os.Exit(0)
+	}
+
 	args := flag.Args()
 
 	if len(args) < 1 {