Resolve "Roles and permissions"

Closes #45 (closed)

aleksis/apps/chronos/migrations/0016_add_globalpermissions.py

+# Generated by Django 3.0.5 on 2020-04-30 19:03
+
+import django.contrib.postgres.fields.jsonb
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chronos', '0015_rename_abbrev_to_short_name'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GlobalPermissions',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('extended_data', django.contrib.postgres.fields.jsonb.JSONField(default=dict, editable=False)),
+            ],
+            options={
+                'permissions': (('view_all_timetables', 'Can view all timetables'), ('view_timetable_overview', 'Can view timetable overview'), ('view_lessons_day', 'Can view all lessons per day')),
+                'managed': False,
+            },
+        ),
+    ]