hello Robin,
you're right, I should have been more explicit in the documentation. This library intents to generate signals to uln2003/2803 based boards (unipolar motors) or boards with double h-bridge (bipolar motors). These boards do not have the advanced features that are typically found in ramp type boards. (this term is right? sorry my english). So, this lib try provide a better control with no hardware resources.
I have no experience with these boards, but I imagine that some of the features offered by the lib would not be needed and others not be possible to implement. Recently I got some units of the Pololu board and I plan to do some testing. Perhaps it is possible to adapt the lib to work with these boards, but I think it would be better to make another version especially for these boards.