upgrade to manifest v2

WebContent/manifest.json

@@ -1,18 +1,31 @@
 {
-  "name": "JSONView",
-  "icons": {
-	"16": "jsonview16.png",
-	"48": "jsonview48.png",
-    "128": "jsonview128.png"},
-  "version": "0.0.30",
-  "description": "Validate and view JSON documents",
-  "options_page": "options.html",
-  "background_page" : "background.html",
-  "content_scripts": [{
-	  "matches": ["http://*/*", "https://*/*", "ftp://*/*", "file:///*"],
-	  "js": ["content.js"],
+  "name": "JSONView",
+  "icons": {
+	"16": "jsonview16.png",
+	"48": "jsonview48.png",
+    "128": "jsonview128.png"},
+  "version": "0.0.32",
+  "description": "Validate and view JSON documents",
+  "options_page": "options.html",
+  "background" : {
+    "scripts": [
+      "background.js"
+    ]
+  },
+  "content_scripts": [{
+	  "matches": ["http://*/*", "https://*/*", "ftp://*/*", "file:///*"],
+	  "js": ["content.js"],
 	  "run_at" : "document_end",
-	  "all_frames" : true
+	  "all_frames" : true
   }],
-  "permissions" : ["contextMenus", "clipboardWrite", "http://*/",  "https://*/", "ftp://*/"]
+  "web_accessible_resources": [
+    "jsonview.css",
+    "jsonview-core.css",
+    "content_error.css",
+    "options.png",
+    "close_icon.gif",
+    "error.gif"
+  ],
+  "permissions" : ["clipboardWrite", "http://*/", "contextMenus", "https://*/", "ftp://*/"],
+  "manifest_version": 2
 }