A filter now has a name, using that for representation, will reduce verbosity
WIP On the logic after the crawl. Using items new id attributes. We are now able to compare them between runs. Updating them. We are now storing the history of sent alerts in order to know whether we should send an alert when a previously crawled item has changed (as, now, we can compare them, using their id). Still TODO send the actual alert
Code for sending alerts. Testing outside of the code, integration not tested yet