Implemented multiple/named shopping lists (closes #190)

migrations/0062.sql

@@ -0,0 +1,14 @@
+ALTER TABLE shopping_list
+ADD shopping_list_id INT DEFAULT 1;
+
+CREATE TABLE shopping_lists (
+	id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
+	name TEXT NOT NULL UNIQUE,
+	description TEXT,
+	row_created_timestamp DATETIME DEFAULT (datetime('now', 'localtime'))
+);
+
+INSERT INTO shopping_lists
+	(name)
+VALUES
+	('Default');