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
Merge branch 'dict_set_lab' into exceptions
mailroom with dict, but has some bugs
most of session 5 complete
rearranging, messy code
finished session 5
mailroom rearranged, haven't tested
cleaned up homework a bit

added some solutions to the code directory
Merge branch 'master' of github.com:codefellows/sea-c15-python
worked out bugs, made safe_input.py return empty string instead of None
changed formatting to use .format()
full path program added
added copy_file function to file_manip.py
no real change, cleaning up files