Removed argument for --latest.  Going to rework this aspect of the program.
No code changes, just reorganized methods.
Changed get_latest_version to look at an existing directory of binaries and to compare version numbers as you would expect (left to right, each segment compared individually).
Modified get_latest_versions to work for versions with leading zeros.  Modified generate_build_list to take index and allPkg args.  Index allows specifying where to write the index, allPkgs picks between dumping all packages or just the latest ones.  Modified argparse code to take the extra arguments.
Fixed bug preventing base-url argument from working.