Miner: Prevent saving duplicate files

[neoneye]

When running a duplicate checker program, it finds duplicate files among the candidate programs.

Every candidate program is executed if it generates the correct integer sequence. So it's wasted effort on computing programs that have already been checked.

Within LODA-RUST, Add the existing candidate programs to the bloomfilter, so candidate programs gets rejected, before starting to compute the integer sequence.

Screenshot of Duplicate Files Finder.

Eventually add a script for removing duplicates.

Thanks to @kotenok2000 for reporting this issue.