Benchmark library

[gypsephi]

For evaluation purpose library functions for micro benchmarks are needed.
(Reference Project: Google Benchmark https://github.com/google/benchmark)

The following features should be provided:

• Benchmark macro to define and execute benchmarks
• Platform independent (implement platform dependent stuff (timers etc.) for each platform)
• Measure execution latency (cpu ticks and time)
• Benchmark repetition (configurable by parameter)
• Vector of configurations as a parameter for repetitive execution
• Print results in human readable way (Print as table: Benchmark name, repetitions, configuration, Min, Max, Median, average)