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should return primary_keys correctly now. 

In order for this to work specify the xml option in a record. 
The xml option is an array that has 2 keys. 

ignore_fields is an array of fields that are not displayed in the xml
include_relations(optional) is an array of relations that should be included in
the xml. 

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Ticket: 194

Refactored Doctrine_Connection: separated into two different classes Doctrine_Connection and Doctrine_Transaction

Doctrine_Record::getID() -> obtainIdentifier()
Doctrine_Record::setID() -> assignIdentifier()

removing the closing PHP tags form all php files, it\'s not needed and can break sessions which are whitespace sensitive

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Fixed a small bug in Doctrine_Lib.class.php where the non-existant Doctrine_Session::getStateAsString was called instead of Doctrine_Lib::getSessionStateAsString.

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