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
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
complete draft of Session 6: still to do: clean up homework definition and examples.
added a unicode suppliment
added htm builder homework assignment.
added running code and example output to git.
Merge branch 'master' of github.com:codefellows/sea-c15-python
add homework listings for early sessions
cleaned up the run code for html renderer