Parallelization of _tools. How to prepare Pull-Requests?

[vilmarzti]

Hi there,

Over the last few days I roughly parallelized the computation of disflow, gauss and bilateralAdv. Using either the multiprocessing library from python or in the case of gauss, directly in the cpp code. I also added bash-files for compiliation on linux using gcc.
If there is some interest in this, I will prepare the PR. And if so, I need to know how to clean up the code for the PR to be accepted.

[nicolai256]

could you send over the code to me? thanks :)