Single file collections (#132)

* Files based collections skeleton

* listing file based cards

* create new entry with collection

* moved lookupEntry to main backend

* Editing single page Collections file

* List widget basic implementation

* Adjustments for test-repo

* check if value exists before trying to iterate over

src/valueObjects/Entry.js

@@ -6,6 +6,7 @@ export function createEntry(collection, slug = '', path = '', options = {}) {
   returnObj.partial = options.partial || false;
   returnObj.raw = options.raw || '';
   returnObj.data = options.data || {};
+  returnObj.label = options.label || null;
   returnObj.metaData = options.metaData || null;
   return returnObj;
 }