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

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

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

2. Merging Doctrine_Db functionality into Doctrine_Connection

3. Merging Doctrine_Db modules to Doctrine_Connection plugins

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Fixed sqlite connection function binding issue when using Doctrine_Db as well as added proper primary key handling for export methods

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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