'rerun' capability

[mkocikowski]

Ability to 'rerun' a benchmark, that is, to run a benchmark with the same parameters as some other benchmark. The command line arguments, the the content of the 'config' file are recorded with each benchmark. So lets say this gets 'dump'-ed, put into gist, then someone else loads it into their machine, but they want to run the same benchmark on their machine - there could be a --rerun argument to 'run' a benchmark with the same parameters as some other previously recorded benchmark.