* test new PostSortLoader in live env

* finish writing tests for utils:
  * getContentImage,
  * getImagelessHTML,
  * jsonCopy,
  * isEmptyObject
  
* continue writing tests for this lib

* make batch functions take number as first argument if you know you need to make, say, 5 requests.
-1 should make infinite requests until shouldBatchContinue return false