PHPUnit-1.0.0 Released

I bumped the ZEND_ENGINE_1 branch of PHPUnit to 1.0.0 and released PHPUnit-1.0.0 with no functional changes since PHPUnit-0.6.2. I renamed the package to PHPUnit2 in the HEAD branch and bumped the version to 2.0.0 there. These changes aim at compliance with the new PEAR Version Naming Standards.