Feature/robust#13

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jcrowgey wants to merge 3 commits intocavaliergopher:mainfrom

jcrowgey:feature/robust

Commits on Jan 10, 2020

Implement reader for old binary format
Joshua Crowgey
committed

Commits on Jan 15, 2020

Add robust mode for reading cpio files with corrpution
Joshua Crowgey
committed

Commits on Jan 16, 2020

Added NewRobustReader constructor since robust is private
Joshua Crowgey
committed