WFukuhara Final Project

Hi Chris - Pull request for final project. I also removed a lambda_keyword.pyc from the slides_sources / week-06 folder because I got a git message it had been modified. Not sure what was going on with that.
Yay, tests! I find it helpful to have long, explicit names for my tests, since you pretty much never run them directly. For example, your first test could be test_highlow_returns_correct_string. You have actually written potential names in your comments, making these the test names means you don't actually even have to look in the test file when a test fails, you just know that test_correct_result_for_avg_high (as opposed to test2_avgresults) didn't work, and figure out why.