[dev] Naming scheme for Imp MIME viewers

[Gunnar Wrobel]

Hi!

When looking at IMP_Horde_Mime_Viewer_Html in  
imp/lib/Mime/Viewer/Itip.php (horde git repo) I was wondering why it  
was named that way. My expectation was that the class name is  
IMP_Mime_Viewer_Html. The latter would seem to make autoloading easier  
but I assume there is a good reason why the class name starts with  
"IMP_Horde_...". Maybe somebody can enlighten me.

Thanks!

Gunnar