Added files to generate input for baseball friends MR example.

* names.txt: file containing a list of names to use
* generate_friends.py: script to generate baseball_friends.csv
* baseball_friends.csv: output of generate_friends.py
Added friend_affiliations.py: my solution for the baseball friends problem.
Added word list to use for the anagrams problem.
Added anagrams.py: my solution to the anagrams problem.
Added incomplete draft of lab notebook.
Added two classic mrjob examples.
Merge branch 'master' of https://github.com/cs109/content