Storage permission dispatcher (#33)

- storage permissions request updated
 - test suite expanded

storage.rules

@@ -2,7 +2,7 @@ rules_version = '2';
 service firebase.storage {
   match /b/{bucket}/o {
     match /{allPaths=**} {
-      allow read, write: if false;
+      allow read, write: if request.auth != null;
     }
   }
 }