Added bin test script.
Integrated bin with new migration manager.
Added missing import of MigrationManager.
Chevcking for migration files in project now.
Checking cmd args now.
Added preliminary command check.
Added a basic migration template.
Writing migration files to "migration" dir for now.
Added a way to migrate up using the manager API.
Added extra method for convenient unique index creation.
Fixed migration class creation.
Fixed generation oof migrations table.
Injecting decorated connection into platform now.
Added unsigned using CHECK constraint to Postgres.
Added proper handling of composite primary keys.
Foreign keys now cascade o both update and delete by default.