Add Support for KFBio-kfb

[peterchen183]

This is the work for supporting KFBio-kfb format. #592

[openslide-bot]

DCO signed off :heavy_check_mark:

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[Frostregen]

Hi @peterchen183 , here is a small bugfix to allow opening files larger than 2 GB: https://gist.github.com/Frostregen/d23cbc39b8b3255f83a7e5afc7226c97

Basically just reading some of the absolute file offsets as uint instead of int.

Best, Frostregen

[tadejsv]

Hey @peterchen183 , in #669 I mostly copy your code - if you like, I can add you as the co-author for the first commit ?

[peterchen183]

Hey @peterchen183 , in #669 I mostly copy your code - if you like, I can add you as the co-author for the first commit ?

Yes, please feel free!