adding demo for filtering by alphabet
force all items through the pipe by calling doall, but executing this in a future so that a progress atom can be returned immediately
adding progress endpoint to see how scraping is progressing
tweaking queue sizes so that the number of recipes to be fetched is known earlier
progress now shows percent completion
adding progress bar to population feature in demo
adding elapsed time to progress and showing on demo
adding a populate-all button which populates all recipes