Fetch and print AppStore reviews across all countries. Optionally save reviews to mongoDB.
It works very slow as it does fetch data sequentially.
based on "Apple AppStore reviews scrapper" by Tomek "Grych" Gryszkiewicz https://github.com/grych/AppStoreReviews
based on "Scraping AppStore Reviews" blog by Erica Sadun http://blogs.oreilly.com/iphone/2008/08/scraping-appstore-reviews.html
AppStore codes are based on "appstore_reviews" by Jeremy Wohl https://github.com/jeremywohl/iphone-scripts/blob/master/appstore_reviews