[IO-500] Running of the benchmark

Dear all, I pushed some cleanups to the repository and a README.md file (top level). Hope that provides certain answers, we know the description are not yet perfect, but they will be improved over time given that additional questions arise. Thanks for those of you that send feedback, do not hesitate to give feedback. Do not hesitate to join the slack, here is the invite link that shall never expire: https://join.slack.com/t/vi4io/shared_invite/MjMyOTgxMDg0OTQ1LTE1MDQwNDE4... Usually, Georgios and me are there frequently and can help you with any question that arises. Regards Julian -- http://wr.informatik.uni-hamburg.de/people/julian_kunkel