Contributions for robustness tests

[TugrulhanKeskin]

I added 2 modules to easily corrupt the dataset for robustness tests. I created the subcorruption module for easy observation of the effects of corruption. I made changes to the corruption codes for a smooth transition between the corruption levels.

[bmitzkus]

Hey, thanks for your contribution. Sadly, in the current state this is impossible to review. Please remove all the .jpgs from the merge request and I'll take a look =)