Setting and getting systemwide static parameters

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[...]
Users with console subsystems may well wish to share these parameters between `main.php` and `config.php`, and this can be done by creating a shared, common include file:

```php
// in protected/config/_common.inc
$commonParams = array(
'email'
      => 'steve@unixwiz.net',
'someOption' => true
);


// in protected/config/main.php
[...]