Bladebit GPU plotter - beta

Latest version now includes automated plot checking and deletion if it does meet the requirements

If it deletes the plot it doesn’t currently plot a replacement, so if you specify 100 plots, and 3 are deleted you will get 97 plots.

./bladebit_cuda -f <key> -c <contractadress> -n 1  --compress 7 cudaplot --check 100 --check-threshold 0.8  /mnt/plotstmp/

 --check <n>          : Perform a plot check for <n> proofs on the newly created plot.
 --check-threshold <f>: Proof threshold rate below which the plots that don't pass
                         the check will be deleted.
                         That is, the number of proofs fetched / proof check count
                         must be above or equal to this threshold to pass.
                         (default=0.6).