Add helper to do hashing

cmd/README.md

@@ -0,0 +1,6 @@
+
+To run the hasher, do like this
+
+```bash
+$ go run hasher.go hunter2
+```

cmd/hasher.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+func main() {
+	password := os.Args[1]
+
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), 12)
+	if err != nil {
+		fmt.Println("Error generating hash: %s", err)
+	}
+	fmt.Println(string(hash))
+}