updated scraper to parse a site that has all SMC libraries

The [Peninsula Library System](http://plsinfo.org/library-hours) site has all libraries in San Mateo County, so I updated the scraper to parse this site instead. The libraries are listed by letter, so the scraper goes through the alphabet and parses through each page. Note that the site is missing hours for the Bookmobile Library, so the csv file that the parses produces will be missing those hours. They can be added manually later.