Improvements

Added ProgressHelper for calculating and displaying basic text-based progress bars.

The main advantage of the progress helper over default round() calculation is that it only fully displays 0 and 100 percent borders (including the char icon representation) if truly fully that min/max value. So for 0.9999 as well as 0.0001 etc it will not yet display the completely full or empty bar. If you want that, you need to pre-round before passing it in.