more work on the presentation for sessions 4 -- plus a coulple typo corrections for session 2 -- we may want to use this again!
added solution to rot13 assignment
updated session 4, and added script to build gh-pages
made buld script executable
added directions for the homework
final (?) version of session 4
slight update to homework
most of session 5 complete
finished session 5
cleaned up homework a bit

added some solutions to the code directory
Add mailroom.py--empty file
Merge branch 'master' of github.com:codefellows/sea-c15-python
start on session 6
Merge branch 'master' of https://github.com/cewing/codefellows_f2_python
Add mailroom.py with complete donation module.
Added thankyou letter function.
complete draft of Session 6: still to do: clean up homework definition and examples.
added a unicode suppliment
Merge remote-tracking branch 'upstream/master'
Complete mailroom.py