Consolidated a few things. Initial entry of Inflector class. Moved some methods from Doctrine base class to Doctrine_Lib and Doctrine_Inflector.

some small refactorings. adding docblocks. creating guard clauses. refactor our some code into methods. no aditional test failures so it looks ok. also added some @todo comments

added new xml options record_name and collection_name so that you can override default behavior if wanted

fixed some in the export xml functions to correctly show records if no ignore_fields are set and to use database table name and not classname as basis for xml containers

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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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