Use this config with the flex-tool-bar plugin for tool-bar

toolbar.cson

[
  {
    type: "url"
    icon: "calendar"
    url: "https://www.google.com/calendar/render?tab=wc#main_7"
    tooltip: "Google Calendar"
  }
  {
    type: "spacer"
		style: {
		  border: "1px solid rgba(255, 255, 255, .075)"
		}
  }
  {
    type: "url"
    icon: "bug"
    url: "http://jira.zephyr-intranet.com/secure/Dashboard.jspa"
    tooltip: "Zephyr JIRA"
		iconset: ""
  }
  {
    type: "url"
    icon: "gist"
    url: "http://stash.zephyr-intranet.com"
    tooltip: "Zephyr Stash"
		iconset: ""
  }
  {
    type: "url"
    icon: "server"
    url: "http://bamboo.zephyr-intranet.com"
    tooltip: "Zephyr Bamboo"
		iconset: ""
  }
  {
    type: "url"
    icon: "versions"
    url: "http://confluence.zephyr-intranet.com"
    tooltip: "Zephyr Confluence"
		iconset: ""
  }
  {
    type: "url"
    icon: "octoface"
    url: "https://github.com/peterkc"
    tooltip: "Github Page"
  }
  {
    type: "url"
    icon: "bolt"
    url: "https://vm-zeus.zephyr-intranet.com"
    tooltip: "VM"
		iconset: "fa"
  }
  {
    type: "spacer"
		style: {
		  border: "1px solid rgba(255, 255, 255, .075)"
		}
  }
  {
    type: "button"
    icon: "code-fork"
    callback: "open-project-in-tower:open"
    tooltip: "Open Project in Tower"
		iconset: "fa"
  }
  {
    type: "button"
    icon: "markdown"
    callback: "markdown-preview:toggle"
    disable: "!markdown"
  }
	{
    type: "button"
    icon: "code"
    callback: "tree-view:toggle"
    tooltip: "Toggle Treeview"
		iconset: ""
	}
	{
    type: "button"
    icon: "three-bars"
    callback: "command-palette:toggle"
    tooltip: "Toggle Command Palette"
		iconset: ""
	}
  {
    type: "spacer"
		style: {
		  border: "1px solid rgba(255, 255, 255, .075)"
		}
  }	
]