Update issue 31 : Save and Load filters created from DLL in GRFX files using new class_factory_dll key. GRF files will always use CoCreateInstance for the stored CLSID.
This makes it much easier to work with graphs containing different builds of the same filter.
If the DLL is not found the GRFX loading code will prompt for a replacement.


git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@373 c2f33eb2-41b2-391d-4cb4-d9d0608729ba