removing nickname and permission_id from RegisteredUsers
renaming column in notifications
renaming tags to tag in keywords
creating offensive_words #324
creating posts #328
creating comments #329
Merge branch 'migrations' of https://github.com/yousraHazem/Topsoft-14 into C2_S43_As_a_child_I_can_add_a_photo_to_my_event_form

Issue #319 pull migrations branch