First deocding fix for #53 , rendered image is incorrect.
Removing some debug print
Got back correct chroma dequantization for progressive JPEG
Add reading of delays without breaking the existing type signatures.
Break delay reading out into a separate function instead of mixing it with the frame decoding.
Merge pull request #59 from bit-shift/gif-delay

Add reading of gif frame delays without breaking the existing type signatures.
Merge pull request #57 from iger/master

comment changes