Api (#2439)

* [Update] 迁移settings到独立app

* [Update] 修改settings migrations

* [Update] 修改docs说明

apps/settings/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+# Generated by Django 2.1.7 on 2019-02-26 03:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Setting',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, unique=True, verbose_name='Name')),
+                ('value', models.TextField(verbose_name='Value')),
+                ('category', models.CharField(default='default', max_length=128)),
+                ('encrypted', models.BooleanField(default=False)),
+                ('enabled', models.BooleanField(default=True, verbose_name='Enabled')),
+                ('comment', models.TextField(verbose_name='Comment')),
+            ],
+            options={
+                'verbose_name': 'Setting',
+                'db_table': 'setting',
+            },
+        ),
+    ]