feat: add basic data model support

wuttjamaican will provide a default data model with minimal tables;
it's assumed each custom app will extend this model with other tables

tests/test_app.py

@@ -88,6 +88,30 @@ class TestAppHandler(TestCase):
         value = self.app.get_setting(session, 'foo')
         self.assertEqual(value, 'bar')
 
+    def test_model(self):
+        try:
+            from wuttjamaican.db import model
+        except ImportError:
+            pytest.skip("test not relevant without sqlalchemy")
+        else:
+            self.assertNotIn('model', self.app.__dict__)
+            self.assertIs(self.app.model, model)
+
+    def test_get_model(self):
+        try:
+            from wuttjamaican.db import model
+        except ImportError:
+            pytest.skip("test not relevant without sqlalchemy")
+        else:
+            self.assertIs(self.app.get_model(), model)
+
+    def test_get_title(self):
+        self.assertEqual(self.app.get_title(), 'WuttJamaican')
+
+    def test_make_uuid(self):
+        uuid = self.app.make_uuid()
+        self.assertEqual(len(uuid), 32)
+
 
 class TestAppProvider(TestCase):