print_progress: Print progress of DE
In fcampelo/ExpDE: Modular Differential Evolution for Experimenting with Operators

Echoes the progress of DE to the terminal

1	print_progress()

This routine accesses all variables defined in the calling environment using parent.frame(), so it does not require any explicit input parameters. However, the calling environment must contain:

showpars: list containing parameters that control the printed output of moead(). Parameter showpars can have the following fields:
- $show.iters = c("dots", "numbers", "none"): type of output. Defaults to "numbers".
- $showevery: positive integer that determines how frequently the routine echoes something to the terminal. Defaults to 1.
iters() : counter function that registers the iteration number