Benchmark automation

##Description: Creating a NodeJS Client for the Benchmark suite, so we can easily automate Benchmark test runs.

##Commands:

• benchmark (runs all benchmark tests)
• benchmark micro (runs all micro tests)
• benchmark macro (runs all macro tests)
• benchmark micro name1 ... (runs the given set of micro tests)
• benchmark macro name1 ... (runs the given set of macro tests)

All operations accept an optional --save=testRunName attribute to save the output to a file