rewrite migrations

+ delete older migrations ... oops
+ change migratrions from "migrations" to "dbmigrations"
+ restructure migrations, order them based on release version
+ add a utils/decorators.py file with a coroutine decorator

app/setup/sqlite.py

@@ -4,12 +4,17 @@ Applies migrations.
 """
 
 from app.db.sqlite import create_connection, create_tables, queries
-from app.migrations import apply_migrations, set_postinit_migration_versions
-from app.migrations.__preinit import run_preinit_migrations, set_preinit_migration_versions
-
+from app.migrations import apply_migrations
 from app.settings import Db
 
 
+def run_migrations():
+    """
+    Run migrations and updates migration version.
+    """
+    apply_migrations()
+
+
 def setup_sqlite():
     """
     Create Sqlite databases and tables.
@@ -17,25 +22,12 @@ def setup_sqlite():
     # if os.path.exists(DB_PATH):
     #     os.remove(DB_PATH)
 
-    run_preinit_migrations()
-
     app_db_conn = create_connection(Db.get_app_db_path())
-    playlist_db_conn = create_connection(Db.get_userdata_db_path())
+    user_db_conn = create_connection(Db.get_userdata_db_path())
 
     create_tables(app_db_conn, queries.CREATE_APPDB_TABLES)
-    create_tables(playlist_db_conn, queries.CREATE_USERDATA_TABLES)
-
+    create_tables(user_db_conn, queries.CREATE_USERDATA_TABLES)
     create_tables(app_db_conn, queries.CREATE_MIGRATIONS_TABLE)
-    create_tables(playlist_db_conn, queries.CREATE_MIGRATIONS_TABLE)
 
     app_db_conn.close()
-    playlist_db_conn.close()
-
-
-def run_migrations():
-    """
-    Run migrations and updates migration version.
-    """
-    apply_migrations()
-    set_preinit_migration_versions()
-    set_postinit_migration_versions()
+    user_db_conn.close()