set up the spider for your cs103

not sure if it will extract links. I will check tomorrow. also i used
Selector() but you can also use HtmlXPathSelector()
documentation for each respective one

http://doc.scrapy.org/en/0.20/topics/selectors.html#module-scrapy.selector
http://doc.scrapy.org/en/0.14/toselectors.htmlpics/
read my comments on what I did/had trouble with.