Fixed PHPDoc documentation (e. g. added file header).
Added configuration file for "phpDocumentor".
Updated configuration file for "PHPUnit" (to work with v4.0).
Fixed `composer.json`:
- Fixed dependencies.
- Added development dependencies.
- Using PSR-4 autoloader now.

Signed-off-by: Florian Wolters <wolters.fl@gmail.com>
Enhanced documentation to reflect latest changes.

Signed-off-by: Florian Wolters <wolters.fl@gmail.com>
Updated metadata for PEAR package.