As discussed postfix admin support mode, with commaseparated list of adresses in forward

History
0.3 Added Posfix admin compatible mode where aliases are a single line in the alias database and forwards are
    encoded as commaseparated list of adresses.
 The plugin enforces a minmum of one alias or mailbox.
    Added information to pop-up for deletion
    Eye Candy - Added styling to output
    Fixed quoting in config.inc.php.dist
    Tested with roundcube v0.9.1

![13-08-21 12-06-14](https://f.cloud.github.com/assets/3484222/1000553/de31f8b4-0a4e-11e3-8dd3-7333e8d7b7e4.jpg)
![13-08-21 12-06-24](https://f.cloud.github.com/assets/3484222/1000554/de34f122-0a4e-11e3-831c-fad9e535f767.jpg)