[Seaside] Mime type static files Kom

[Francois Stephany]

Hi all,

When serving static files with Kom, the Content-type is always set on 
'text/html'. I've committed a new version of KomHttpServer that should 
correct this bug. As i'm not familiar with Kom, can someone have a quick 
look at it?
Is there any test suite for Kom?

Cheers,

Francois