[IO-500] New improved parallel find tool

Hello all, As a reminder, the "find" portion of the IO500 is the least proscribed portion and we encourage you all to innovate heavily in this area by writing your own custom tools. However, we do realize that many of you are using the provided tools. Unfortunately, these provided tools have been suboptimal. As such, we are happy to announce that Julian wrote a new parallel find tool that is much improved over the previous. It uses C instead of python so should be easier to get up and running in your environments. Additionally, we have found that the "find" functionality can take an intractable amount of time. As such, Julian also added stonewall functionality. If you do use it, we will count the score but will mark it accordingly. Instructions for using it are in io500.sh:setup_find. You will want to pull a new clone of the github and rerun ./utilities/prepare.sh to get everything setup. Please let us know if you encounter any difficulties. Thanks, John Julian Jay