[2.0] Added more configuration options that optionally allow to generate PDepend and PHPMD reports and version them by svn revision

[2.0] Refactoring of build.xml to generate coverage xml optionally via build.properties. Also added option to set the phpunit xml configuration file.

[2.0] Fixed some build issues. Added new build properties. Please install VersionControl_SVN pear package in order to use the test target of the build file.

[2.0] Updated description for pear packages. Enhanced ClassLoader to support the old namespace separator (underscore) for Zend/PEAR/... compatibility until some day when they all use 5.3+.

[2.0] Implemented DQL bulk DELETE support for Class Table Inheritance. Other cleanups, refactorings and docblock additions.