Add new activity types, complete course-list.

New activity types:
VID - Videoconference
WRK - Work Term
RSH - Research
THR - Theory and Laboratory
AUD - Audioconference
WEB - Online course
WOC - Online/In-class activities

In addition to pre-existing:
LEC - Lecture
SEM - Seminar
DGD - Discussion Group
TUT - Tutorial
LAB - Laboratory

Complete course list.

Assignment 5 - Review and simplify Umple model