Remove abstract function declarations in TranslatingStrategy
Remove abstract function declarations in TranslatingStrategy

This is necessary in order to support PHP 5.3.8 & lower, due to a bug
that was fixed in PHP 5.3.9:

https://bugs.php.net/bug.php?id=43200

Fortunately, this fix does not break any compatability with future
versions, at least up through PHP 5.6.8.

cspff/query-strategy,thomasalbright/query-strategy