In case anyone needs.
It is a thin wrapper over the fitsio crate by @ srwalker101
Currently only f32 and f64 are supported.
Only map I/O (so that alm and cl are not included) is supported.
(it is only a small utility that I needed to used in my another larger project)
Can you elaborate on how this is meant to be used and what it does? The README.md file is a bit low on details 
Thanks, I have updated the readme.
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