Refactoring the code

- Use Flask blueprint
- Split model and views into smaller parts
- Bug fixes
- API adjustment

powerdnsadmin/models/__init__.py

@@ -0,0 +1,23 @@
+from flask_migrate import Migrate
+
+from .base import db
+from .user import User
+from .role import Role
+from .account import Account
+from .account_user import AccountUser
+from .server import Server
+from .history import History
+from .api_key import ApiKey
+from .setting import Setting
+from .domain import Domain
+from .domain_setting import DomainSetting
+from .domain_user import DomainUser
+from .domain_template import DomainTemplate
+from .domain_template_record import DomainTemplateRecord
+from .record import Record
+from .record_entry import RecordEntry
+
+
+def init_app(app):
+    db.init_app(app)
+    _migrate = Migrate(app, db)