Add table to store cache timestamps

sevenkeys/sql/createdb.sql

@@ -2,6 +2,11 @@ CREATE DATABASE IF NOT EXISTS sevenkeys;
 
 USE sevenkeys;
 
+CREATE TABLE IF NOT EXISTS CacheTimestamps (
+	CacheType ENUM('BulkCardPrintings') PRIMARY KEY,
+	DATETIME Stamp NOT NULL
+);
+
 CREATE TABLE IF NOT EXISTS Gamepiece (
 	Id INT AUTO_INCREMENT PRIMARY KEY,
 	Name VARCHAR(150) NOT NULL