Refactoring

• refactor the code
• add new command line option: num_of_runs, to run a calculation multiple times and take the min, max and averagevalues
• removed kirk, since it does not work with newer versions of crossbeam
• removed simple_parallel, for the same reason

More crates, more options

• Three more methods / crates added: Rayon par_iter, Rust scoped pool, Jobsteal
• Two new command line options: --bench and --no-ppm

Manbelbrot in Rust

• Added Rayon git
• Added new flag: --write_meta_data

Manbelbrot in Rust

• Added support for Rayon
• Added benchmark, images and some more text to the readme file