Pyo3 stub chrono fix-Reentract check-BSCALE

[gsleap]

No description provided.

[d3v-null]

Thanks @gsleap ! the bscale change has certainly fixed #85 , I'll do some more testing for #82

[d3v-null]

#82 is fixed too!

cargo run --features=examples --example mwalib-print-corr-context -- --metafits /scratch/mwaeor/dev/nfdata/1061316664/raw/1061316664{.metafits,_20130823181046_gpubox01_00.fits}
    Finished dev [unoptimized + debuginfo] target(s) in 0.29s
     Running `target/debug/examples/mwalib-print-corr-context --metafits /scratch/mwaeor/dev/nfdata/1061316664/raw/1061316664.metafits /scratch/mwaeor/dev/nfdata/1061316664/raw/1061316664_20130823181046_gpubox01_00.fits`
Error: mwalib has been compiled with a CFITSIO library which was not built with the -DREENTRANT directive

Caused by:
    mwalib has been compiled with a CFITSIO library which was not built with the -DREENTRANT directive