Just a little beautifying

Squashed commit of the following:

commit aece6b5bdcfd92a8bcc27fbe26bb10ae9e2f8e0d
Author: Vinai Kopp <vinai@netzarbeiter.com>
Date:   Wed May 22 19:28:13 2013 +0200

    Fix phpdoc annotations

commit a6ad4e7c925f32cfe07cc7a3f7cf1744970b844c
Author: Vinai Kopp <vinai@netzarbeiter.com>
Date:   Wed May 22 19:27:57 2013 +0200

    Rename variable from customer to order