Not pip installable with Python 3

[funsim]

The dev-restructure branch is currently not pip installable due to some Python 2 code:

simon@doodson ~/src/virtual-classroom git:dev-restructure$ python setup.py install --user
running install
running build
running build_py
running install_lib
creating /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/start_group.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/end_semester.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/api.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/utils.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/student.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/stats.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/collaboration.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/group.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/students_file.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/get_all_feedbacks.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/parameters.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/send_email.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/find_images.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/__init__.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/get_all_repos.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
copying build/lib/virtual_classroom/classroom.py -> /home/simon/.local/lib/python3.6/site-packages/virtual_classroom
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/start_group.py to start_group.cpython-36.pyc
  File "/home/simon/.local/lib/python3.6/site-packages/virtual_classroom/start_group.py", line 151
    print "Handle student {0}".format(name)
                             ^
SyntaxError: invalid syntax
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/end_semester.py to end_semester.cpython-36.pyc
  File "/home/simon/.local/lib/python3.6/site-packages/virtual_classroom/end_semester.py", line 61
    print "Deleting ", member["login"],
                    ^
SyntaxError: Missing parentheses in call to 'print'
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/api.py to api.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/utils.py to utils.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/student.py to student.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/stats.py to stats.cpython-36.pyc
  File "/home/simon/.local/lib/python3.6/site-packages/virtual_classroom/stats.py", line 32
    print "Student are no longer taking this course: ", file_name
                                                     ^
SyntaxError: Missing parentheses in call to 'print'
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/collaboration.py to collaboration.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/group.py to group.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/students_file.py to students_file.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/get_all_feedbacks.py to get_all_feedbacks.cpython-36.pyc
  File "/home/simon/.local/lib/python3.6/site-packages/virtual_classroom/get_all_feedbacks.py", line 128
    print value
              ^
SyntaxError: Missing parentheses in call to 'print'
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/parameters.py to parameters.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/send_email.py to send_email.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/find_images.py to find_images.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/__init__.py to __init__.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/get_all_repos.py to get_all_repos.cpython-36.pyc
byte-compiling /home/simon/.local/lib/python3.6/site-packages/virtual_classroom/classroom.py to classroom.cpython-36.pyc
running install_egg_info
Removing /home/simon/.local/lib/python3.6/site-packages/virtual_classroom-0.0.1-py3.6.egg-info
Writing /home/simon/.local/lib/python3.6/site-packages/virtual_classroom-0.0.1-py3.6.egg-info