Dev extensions reload

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_extName__",
  "description": "__MSG_extDescr__",
  "version": "1.1",
  "manifest_version": 2,
  "author": "Michael Onikienko",
  "default_locale": "en",
  "icons": {
    "16": "img/ext_icons/16.png",
    "48": "img/ext_icons/48.png",
    "128": "img/ext_icons/128.png"
  },
  "background": {
    "scripts": [
      "js/storage.js",
      "js/background.js"
    ],
    "persistent": false
  },
  "commands": {
    "reload_dev_extensions": {
      "description": "__MSG_extDescr__",
      "suggested_key": {
        "default": "Alt+Z"
      }
    }
  },
  "options_page": "options.html",
  "permissions": [
    "management",
    "contextMenus",
    "storage",
    "tabs"
  ]
}