[utils] build_graphs: support output to dumb (terminal)
[utils] build_graphs: add getopts into it, to do it more pretty
[test/travis-ci] build graphs in terminal using build_graph script
[utils] run_benchmarks: fix SELF variable (add PWD if no "/" at start)
[utils] run_benchmarks: fix calling of script from root.

There was an issue with socket address for client and server, just set
it for server too and this will fix the issue.