Modified .gitignore file.
Added Doctrine\DBAL\Portability\Connection with Informix.
Added specific tests for Informix.
Added some Doctrine\DBAL tests modified to work with the Informix platform.
Added bootstrap for tests.
Added Doctrine\DBAL\DriverManager with Informix.
Added Doctrine\Tests\TestUtil with Informix.
Added phpunit sample file.
Added LICENCE, README.md and phpunit.xml.dis files.
Modified TestInit.php

Now it adds the Doctrine\Tests\DBAL namespace from the vendor directory to the autoloader without load its TestInit.php.
Added the composer files.