Resolve "split controllers and models into multiple files"

Closes #58 (closed)

it avoids having huge files with tens of functions and classes. the drawback is that it can easily leads to circular imports problems

smash/web/models/__init__.py

+# coding=utf-8
+from __future__ import unicode_literals
+
+import datetime
+
+from django.contrib.auth.models import User
+
+from flying_team import FlyingTeam
+from location import Location
+from room import Room
+from visit import Visit
+from worker import Worker
+from appointment import Appointment
+from appointment_type import AppointmentType
+from avaibility import Avaibility
+from holiday import Holiday
+from item import Item
+from language import Language
+from subject import Subject
+
+__author__ = 'Valentin Grouès'
+
+
+def get_current_year():
+    return datetime.datetime.now().year
+
+
+__all__ = [FlyingTeam, Appointment, AppointmentType, Avaibility, Holiday, Item, Language, Location, Room, Subject,
+           Visit, Worker]