State of development

[sdraper69]

First off, this library is fantastic. Compared to others I found it looks exactly what I am after.

I appreciate its a free library so not criticising, but, it seems to be a bit lacking in obvious functions for example
Previous button
Ability to have no target (step will just be the description element that's centred within the view)
Custom buttons
More step events

What's the status of development of this?
Anyone know of alternatives that look the same (free or paid?)