Merge pull request #1 from vkargov/master

Fix the comma problem, support multiple compiler arguments and add a few optset configs.
One file for describing each benchmark.
Iterate over all benchmarks automatically.
Add list benchmark that just allocates one huge list.
Comparing of counter values.
Make charts prettier.
Make the legend more compact and movable.
Calculate and show geometric mean for each configuration.
Add an option to print geometric mean of the results into console.