More messages and custom compiler output demo

core/forms.py

core/grady_speak.py

core/models.py

core/templates/core/feedback_form.html

core/templates/core/login.html

core/templates/core/message_box.html

core/templates/core/reviewer_startpage.html

core/templates/core/tutor_startpage.html

core/views/feedback.py

core/views/user_startpages.py

populatedb.py