Merge branch 'session4'
Merging to update
Initial commit on Session5 with count_even.py and dict_set2.py.
Minor count_even.py revisions
Adding lambda_list.py
lambda_list.py revisions
New functional.py, other file management
Extra mailroom2.py deleted
Functional.py exercise continued.
Functional.py almost there.
Functional Assignment completed.
Merge pull request #105 from p-render/session5

Session5 branch: count_even.py, lambda_list.py, dict_set2.py, and unfinished functional.py