Update README with info about the benchmark

[apiraino]

Hi,

just a .2 cents idea.

Could anyone add a little update to the README specifying more details about this benchmark? In no particular order, I am thinking to:

• Why such an application represents a benchmark (maybe with links to learn more on that)
• Which specific features of a programming language impacts
• Which specific features of a underlying operating system / syscalls is harnessing
• Limits and shortcomings of such a benchmark (included factors that could impact reproducing same results on different setups)
• For each language benchmark, ask the submitter to provide exact version of the tools used (e.g. version of the compiler, system libraries, operating system and so on) so people can faithfully reproduce the same results.

The general idea is:

• have people understand what this bench is about
• provide reproducible results

thanks for reading so far :^)