Added subscription confirmation to subscriber;
Added scraping and notification for comments;
Added global scraper for HackerNews website
Added initial code for a more general scraper object
Rewrote global scraper to use the generalised scraper class
Refactored app structure; Made all modules to packages;
Improved scraper and notifier code.
Fixed bugs and refactored some code
Fixed bug that prevented unsubscribing;
Code formatting;