Fixes to scraper.py and added Mac Apps

File generated by scraper.py wasn't readable by the addprinters script. The regex wasn't catching NWCB printers so I switched to string manipulation and fixed it.
Also updated the list of printers.

When showing my roommate how to add the printers, he made it clear that this would be more attractive if he could do it in 2-3 clicks instead of having to download the repo. The app is executable with a just a double click after download. I think a lot of people would be interested in this.
I generated the apps using Platypus.