Add download video and save playlist support.

PlaylistSaverHelper/manifest.json

@@ -4,9 +4,10 @@
   "version": "1.0",
 
   "permissions": [
-  "scripting",
   "activeTab",
-  "cookies"
+  "contextMenus",
+  "cookies",
+  "storage"
 ],
 "host_permissions": [
   "*://*.youtube.com/*"
@@ -16,12 +17,22 @@
     "service_worker": "background.js"
   },
 
+  "options_page": "options.html",
+  "icons": {
+    "128": "icon.png"
+  },
   "commands": {
-    "openPLKey": {
+    "openPLSettingPageKey": {
       "suggested_key": {
         "default": "Alt+Z"
       },
+      "description": "Open settings page"
+    },
+    "openPLKey": {
+      "suggested_key": {
+        "default": "Alt+Y"
+      },
       "description": "Launch PlaylistSaver"
     }
   }
-}
+}