Create initial migration file for Plinth

- To automatically create a schema using syncdb is now deprecated and
  considered legacy.

- Having migrations will help us do schema upgrades in future smoothly.

plinth/migrations/0001_initial.py

@@ -0,0 +1,47 @@
+#
+# This file is part of Plinth.
+#
+# 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/>.
+#
+
+#
+# Generated by Django 1.9 on 2015-12-04 07:27
+#
+
+"""
+Initial Django migration for Plinth to create database tables.
+"""
+
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    """Initial migration schema for Plinth models."""
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='KVStore',
+            fields=[
+                ('key', models.TextField(primary_key=True, serialize=False)),
+                ('value_json', models.TextField()),
+            ],
+        ),
+    ]