Updated the content_security_policy in manifest

Needed to get permission for chrome to access external resource

manifest.json

@@ -19,7 +19,7 @@
   "browser_action": {
     "default_icon": "icon.png"
   },
-  
+
   "permissions": [
     "storage",
     "tabs",
@@ -28,5 +28,7 @@
     "webRequest",
     "webRequestBlocking",
     "\u003Call_urls>"
-  ]
+  ],
+
+  "content_security_policy": "script-src 'self' https://ethereum.github.io/solc-bin/bin/; object-src 'self'"
 }