My flex-tool-bar config file

toolbar.json

[
  {
    "tooltip":  "Github",
    "icon":     "octoface",
    "url":      "http://github.com",
    "type":     "url"
  },

  { "type": "spacer" },

  {
    "tooltip":  "Toggle Themes",
    "icon":     "color-mode",
    "callback": "themes:toggle",
    "type":     "button"
  },
  {
    "tooltip":  "Styleguide",
    "icon":     "pencil",
    "callback": "styleguide:show",
    "type":     "button"
  },
  {
    "tooltip":  "Markdown",
    "icon":     "markdown",
    "callback": "markdown-preview:toggle",
    "type":     "button"
  },

  { "type": "spacer" },

  {
    "tooltip":  "Config",
    "icon":     "settings",
    "callback": "application:open-your-config",
    "type":     "button"
  },
  {
    "tooltip":  "Init Script",
    "icon":     "terminal",
    "callback": "application:open-your-init-script",
    "type":     "button"
  },
  {
    "tooltip":  "Keymap",
    "icon":     "keyboard",
    "callback": "application:open-your-keymap",
    "type":     "button"
  },
  {
    "tooltip":  "Snippets",
    "icon":     "puzzle",
    "callback": "application:open-your-snippets",
    "type":     "button"
  },
  {
    "tooltip":  "Styles",
    "icon":     "ruby",
    "callback": "application:open-your-stylesheet",
    "type":     "button"
  },

  { "type": "spacer" },

  {
    "tooltip":  "Toggle Soft Wrap",
    "icon":     "no-newline",
    "callback": "editor:toggle-soft-wrap",
    "type":     "button"
  },
  {
    "tooltip":  "Toggle tree-view",
    "icon":     "three-bars",
    "callback": "tree-view:toggle",
    "type":     "button"
  },
  {
    "tooltip":  "Fullscreen",
    "icon":     "screen-full",
    "callback": "window:toggle-full-screen",
    "type":     "button"
  },
  {
    "tooltip":  "DevTools",
    "icon":     "tools",
    "callback": "window:toggle-dev-tools",
    "type":     "button"
  },

  { "type": "spacer" },

  {
    "tooltip":  "Themes",
    "icon":     "paintcan",
    "callback": "settings-view:change-themes",
    "type":     "button"
  },

  { "type": "spacer" }
]

Nice! Thanks! Do you know hot to run shell command?