makes the batch2fits faster by only opening the file once.
Tries to incorporate an on the fly fits writer. Seen some success with @adampbeardsley with on the fly fits writing.
TODO:
[ ] Figure out how to incorporate the time fix from EPIC_FFT_DFT branch
[ ] review FITS standard, see if we're missing any required fields
makes the batch2fits faster by only opening the file once. Tries to incorporate an on the fly fits writer. Seen some success with @adampbeardsley with on the fly fits writing.
TODO: