[MIG] attachment_preview: Migration to 11.0

[FIX] Lint

[FIX] lint and flake

[ADD] tests

[ADD] tests

[ADD] tests

[ADD] Tests

[ADD] Package python-magic

[ADD] Tests

[FIX] Lint

attachment_preview/__init__.py

@@ -1,21 +1,4 @@
-# -*- coding: utf-8 -*-
-##############################################################################
-#
-#    OpenERP, Open Source Management Solution
-#    This module copyright (C) 2014 Therp BV (<http://therp.nl>).
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU Affero General Public License as
-#    published by the Free Software Foundation, either version 3 of the
-#    License, or (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU Affero General Public License for more details.
-#
-#    You should have received a copy of the GNU Affero General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-##############################################################################
-from . import model
+# Copyright 2014 Therp BV (<http://therp.nl>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import models