Fixing broken PSR-0 autoload on PHPUnit branch

After namespace conversion, it seems composer autoload was not working due to:

- configuration error in composer.json
- naming convention errors
- wrong use statements

So I had to fix the references to get the new PHPUnit tests passing. Also, RedUnit is not passing on Travis builds after namespace conversion and this terrifies me. Options:

- fix while test coverage increases and new errors emerge
- fix RedUnit before advance test conversion to PHPUnit

PS: The ported Sqlite specific tests are already on the way.