Add lib/, t/lib/, and sandbox/. All modules are updated and passing on MySQL 5.1.

t/lib/samples/compare-warnings.sql

@@ -0,0 +1,11 @@
+DROP DATABASE IF EXISTS test;
+CREATE DATABASE test;
+USE test;
+
+CREATE TABLE t (
+   i int unsigned not null,
+   v varchar(16),
+   t tinyint
+);
+INSERT INTO t VALUES (1,'hi',1);
+