Please note that this is a squshed commit and the work of:
Symbolist, macdiesel, nedbat, doctoryes, muzaffaryousaf and muhammad-ammar

add a migrations to the new django_comment_common to keep things a bit more consistent with our normal useage.

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branch : AB Testing

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rename : user/__init__.py => student/__init__.py
rename : user/migrations/0001_initial.py => student/migrations/0001_initial.py
rename : user/migrations/0002_text_to_varchar_and_indexes.py => student/migrations/0002_text_to_varchar_and_indexes.py
rename : user/migrations/__init__.py => student/migrations/__init__.py
rename : user/models.py => student/models.py
rename : user/tests.py => student/tests.py
rename : user/views.py => student/views.py