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

t/lib/samples/empty_tables.sql

@@ -0,0 +1,12 @@
+-- These are all empty tables with various columns, engines, etc.
+-- They're used to test stuff like issue 672 which requires a least
+-- one empty table.
+DROP DATABASE IF EXISTS et;
+CREATE DATABASE et;
+USE et;
+
+CREATE TABLE et1 (
+  i int,
+  unique index (i)
+);
+