Database features. Development has started.

scheme.sql

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+BEGIN TRANSACTION;
+-- DROP TABLE IF EXISTS `user`;
+CREATE TABLE IF NOT EXISTS `user` (
+  `id`  INTEGER PRIMARY KEY AUTOINCREMENT,
+  `user_id` TEXT NOT NULL,
+  `user_name` TEXT NOT NULL,
+  `site_name` TEXT,
+  `site_user` TEXT,
+  `site_pass` TEXT,
+  `date` INTEGER NOT NULL
+);
+COMMIT;