Don't warn when attempting to read a file not in zip
Don't warn when attempting to read a file not in zip

Fixes #303

mfikes/planck,slipset/planck,slipset/planck,slipset/planck,slipset/planck,mfikes/planck,mfikes/planck,slipset/planck,mfikes/planck,mfikes/planck,mfikes/planck