Added documentation

CourseCodes.xlsm: An Excel file with macros to download a user-specified
list of courses from the University of Ottawa's website. Will be used to
create .csv's for the server.
SEG2105A Assignment 5.docx: The planning documentation required as
assignment 5. Includes problem description, system description, user
stories, architecture (incomplete), UML (not started), and some sample
messages (not started).