Add `--php-binary` & `--concurrent-processes`.
Add `--php-binary` & `--concurrent-processes`.

The `--php-binary` value is copied to the `--php` option of atoum.
The `--concurrent-processes`  value is copied to the
`--max-children-number` option of atoum.

Grummfy/Central,vcgato29/Central,vcgato29/Central,Grummfy/Central