reverting the reorganization done in 3455-3456 in order to make merging my experimental branch to trunk easier.

Preparation for new organization of code in to sub packages. Changed autoload() to work with new structure.

Makes it easier to see the dependencies between these two concerns, cache the results of the query parsing process later on, implement & use alternative hydrators to experiment with different algorithms etc. etc.
Other small refactorings.

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Refactoring. Started to introduced a clear separation between column names and field names (aka column aliases).\nDoctrine_Connection, DQL Parser classes/methods map field names => column names.\nDoctrine_Hydrate maps column names => field names during hydration.\nColumn names are only stored in Doctrine_Table:: and Doctrine_Table::.\nRelations use column names in 'local'/'foreign'.\nWhen using field names (column aliases) you need to use the column names in 'local'/'foreign' when setting up a relation (hasOne/hasMany), not the field names.\n\n In other words column names are only used to communicate with the database. field names are used everywhere else. the casing of field names does not matter. column names are forced to lower case for portability. If you dont use field names (column aliases) your column names are your field names (and therefore all lowercase).

called in Doctrine_Connection_UnitOfWork->delete().

added tests to get complete coverage of Transaction, RawSQL, AuditLog and Query/Having. Related refactorings. Added some getters to be able to test. Also added coverage report for these changes

refetch state after preSave listener in unit of work. if state changes in preSave listener it is not taken into concideration when an object is saved/deleted etc. also fixed some small stuff in tests and added new coverage report

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Doctrine_Connection_Sqlite::connect was creating functions every time it was called even if it was allready connected.

deletes are no longer stacked in the end of transaction, now transactional integrity is always assured

Added some user functions (trim, ltrim, rtrim, sha1), the trim function prevented the tests from running

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