Escape single quotes in the password so that we don't break our config

syntax.  Related to (but unclear that it fixes) ticket #650.

installer/database_config.php

@@ -31,7 +31,7 @@ $config['default'] = array(
   'connection'    => array(
     'type'     => '<?php print $type ?>',
     'user'     => '<?php print $user ?>',
-    'pass'     => '<?php print $password ?>',
+    'pass'     => '<?php print str_replace("'", "\\'", $password) ?>',
     'host'     => '<?php print $host ?>',
     'port'     => false,
     'socket'   => false,