[docs] xmldocs - racke modified 2 files

[Davor Ocelic]

> <screen>
> 	Require module Vend::Swish
> 	AddDirective Swish hash
> 	Variable swish Vend::Swish
> </screen>

The convention is:

Use <screen> for excerpts from actual Interchange code.
Use <programlisting> for elements that you suggest users to write.