patch: Adding new options to the progressbar

[dimtrovich]

• Ability to change label location: previously, the label was always placed at the bottom of the progressbar. This pull request lets dev choose where to place it
• Possibility of hiding the progress percentage: originally, I'd designed it to be used internally by the spinner (since we didn't need it in the spinner), but given that the spinner is a complex subject (see Feat add spinner to output #89) perhaps we could come back to it. Nevertheless, I think it could be useful in a classic case, which is why I've kept it.