message: Remove keyboard commands
diff: "name": "Are.na",
  "description": "Assemble and connect information.",
  "version": "0.3",
  - "commands": {
  - "save-page": {
  - "suggested_key": {
  - "default": "Ctrl+Shift+0"
  - },
  - "description": "Save current page to selected channel"
  - },
  - "_execute_browser_action": {
  - "suggested_key": {
  - "default": "Ctrl+Shift+F",
  - "windows": "Ctrl+Shift+F",
  - "mac": "Command+Shift+F",
  - "chromeos": "Ctrl+Shift+F",
  - "linux": "Ctrl+Shift+F"
  - }
  - }
  - },
  "browser_action": {
  "default_icon": "icon-128.png",
  "default_title": "Are.na"
  "identity"
  ],
  "background": {
  - "scripts": ["background.js"]
  + "scripts": ["background.js"],
  + "persist": false
  },
  - "web_accessible_resources": [
  - "/",
  - "index.html",
  - "iframe.css"
  - ],
  + "web_accessible_resources": ["/", "index.html", "iframe.css"],
  "content_scripts": [
  {
  - "matches": [
  - "<all_urls>"
  - ],
  - "js": [
  - "injectiframe.js"
  - ]
  + "matches": ["<all_urls>"],
  + "js": ["injectiframe.js"]
  }
  ]
  }
  