* support for buggy PDO_OCI version attribute read http://drupal.org/node/1028054#comment-4062816
* readded USETNS from siromega which was deleted in the last releases to support tns format
finally i've put together some bug, fixes, performance enhanchements and the new install.inc that keeps PL/SQL objects outside of PHP so that is easier to keep trac of changes and fix bugs (hopefully).
* added some performance (and the possibility to cache translated statements in memcached using cache_set and memcached module)
* improved the group by alias translation
* fixed some bugs