[pproc] get rid of old constrained pickle files

amend sample sizes for bootstrap and instance multipliers

implement DataSet.percentiles and .evals_with_sim... and bug fixes

a few minor improvements and a cocopp.reduce_size script

fix two instance set display issues

add date and time to output folder and minor bug fix

[parameter-sweep] allow to display a parameter sweep by a heat color map

[parameter-sweep] parameter-sweep option does not have an argument an…

…ymore

[parameter-sweep] improve interface

minor merge