Added commit and rollback to SQLRelayDriver
Added the "implements" declaration
Make field names lower case when return from database.
Added PDO Oracle support.
Minor bug fix.
Merge branch 'master' into php53

Conflicts:
	xmlnuke-php5/src/Xmlnuke/Core/Database/DBOci8Driver.class.php
	xmlnuke-php5/src/Xmlnuke/Core/Database/DBPDODriver.class.php
	xmlnuke-php5/src/Xmlnuke/Core/Database/DBSQLRelayDriver.class.php