Major bug fixes

This release fixes 2 major bugs with the previous release:

1 - Unfortunately, a debugging line of code was left over during prior development. The Lego pumps hard a hard-coded line setting the speed to the maximum regardless of any prior setting.
2 - Changes in the code's internal logic made it so the step duration was always set as seconds and ignoring when users chose minutes or hours.

Please find more information on how to install in the Wiki.