re-organize test files, make it easy to test for both php 5.2 and 5.3

simpletest/ErrorTest_53.php

@@ -0,0 +1,19 @@
+<?
+class ErrorTest_53 extends SimpleTest {
+  function test_1_error_handler() {
+    global $anonymous_error_callback_worked;
+    
+    DB::$throw_exception_on_error = false;
+    DB::$error_handler = function($params) {
+      global $anonymous_error_callback_worked;
+      if (substr_count($params['error'], 'You have an error in your SQL syntax')) $anonymous_error_callback_worked = 1;
+    };
+    DB::query("SELET * FROM accounts");
+    $this->assert($anonymous_error_callback_worked === 1);
+    
+  }
+  
+
+}
+
+?>