#2 improved and enhanced pnginfo.py

[Martin W. Kirst]

I've extended the pnginfo.py for detecting width&height
of PNG images.

I've also did some massive restructuring to this file
for better enhancements in future.

Give it a try :-)

[Martin W. Kirst]

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Sorry, I've forgot to upload a file ;)

[Martin W. Kirst]

gzipped unified patch file for pnginfo.py