lab 11: change pre-req graph

[aaronbloomfield]

From aaronbloomfield#150:

• it still says you need cs2110 for cs3330, when you need cs2150
• add more courses into the bigger graph

A follow-up:

How many more courses do we want in the bigger graph? (10 more? 20 more? 100 more?) I ask because scraping the registrar's webpage and using a large number of classes as input could be feasible (at least for input generation--not sure about grading). 😛