Add DbalPerformanceTestListener to collect & report performance test timing results.

Remove AllTests approach to PHPUnit and work with a phpunit.xml.dist from the top level of the repository.

[2.0] Solved the hassle with dropping/creating the test database through introducing a second test database for temporary connections. Please check the dbproperties.xml.dev file for reference. The 2 test databases need to be created *once* before the very first time of running the tests. New procedure successfully tested against mysql, postgresql, oracle.

First tests for basic collection implementation. First experimental use of closures (Currently commented out, because the svn server makes a syntax check against 5.2.x).