created a cron job to auto batch insert json files into neo4j db

- promisified a couple batch op functions (but not batchInsertRec itself)
- added a cron job that will automatically check the json folder (scraped websites and wordcounts) for neo4j
- right now it's in demo/testing phase, to use for real: 
  1. In cronBatchInsert.js  --> uncomment 'testDir = jsonDir

*note* actual web scraping / rss checking is NOT currently on the cron job, has to be added in the future