edit unpublished content on EntryPage (through HOC)

src/backends/github/implementation.js

@@ -90,4 +90,12 @@ export default class GitHub {
       };
     });
   }
+
+  unpublishedEntry(collection, slug) {
+    return this.unpublishedEntries().then((response) => (
+      response.entries.filter((entry) => (
+        entry.metaData && entry.metaData.collection === collection.get('name') && entry.slug === slug
+      ))[0]
+    ));
+  }
 }