Ascent rate and other stored information

[Björn Spruck]

> Also my resources (time) are limited, so I rather prefer to satisfy
> the majority of people with a more limited but well supported set of
> information, than to spend huge amounts of time on features that are
> little used.
Nobody claims you have to it alone.
I am willing to help restructure the lib as soon as it is somehow clear
what and how it has to be changed.