Removed use of unicode_literals in migrations, because it causes many migrations…

Removed use of unicode_literals in migrations, because it causes many migrations to generate TypeError

django_notify/migrations/0001_initial.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

django_notify/migrations/0003_auto__add_field_subscription_latest.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

django_notify/migrations/0004_auto__chg_field_notification_url.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0001_initial.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0002_auto__add_field_articleplugin_created.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0003_auto__add_field_urlpath_article.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0004_populate_urlpath__article.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import DataMigration

wiki/migrations/0005_auto__chg_field_urlpath_article.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0006_auto__add_attachmentrevision__add_image__add_attachment.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0007_auto__add_articlesubscription.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0008_auto__add_simpleplugin__add_revisionpluginrevision__add_imagerevision_.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0009_auto__add_field_imagerevision_width__add_field_imagerevision_height.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0010_auto__chg_field_imagerevision_image.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0011_auto__chg_field_imagerevision_width__chg_field_imagerevision_height.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0012_auto__chg_field_attachmentrevision_user__chg_field_attachmentrevision_.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/migrations/0013_auto__chg_field_attachmentrevision_previous_revision__chg_field_revisi.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/plugins/attachments/migrations/0001_initial.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration

wiki/plugins/notifications/migrations/0001_initial.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration