add bin

bin/cli.js

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 (function () {
 'use strict';
 

package.json

@@ -3,6 +3,9 @@
   "version": "1.0.0",
   "description": "Like hexdump on *nix, but in JavaScript.",
   "main": "hexdump.js",
+  "bin": {
+    "hexdump.js": "./bin/cli.js"
+  },
   "scripts": {
     "test": "node bin/cli.js hexdump.js"
   },